图片映射（HTML Map）自适应窗口大小，再也不用为匹配尺寸而发愁了
浏览数：14 /
时间：2015年06月09日
在上一节图片映射那么拽中，我们讲了图片映射的使用方法，然而很多小伙伴们抱怨图片不能根据页面的窗口调整而自适应，图片地图成了摆设，今天给大家分享一个插件，有了它，小伙伴们再也不用担心图片地图走错门了。话不多说，直接上源码：
示例HTML文件：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta http-equiv="imagetoolbar" content="no">
<title>热区图片拖拽</title>
<script src="map.js" type="text/javascript"></script>
<script type="text/javascript">
Number.prototype.NaN0=function(){return isNaN(this)?0:this;}
var bDrag=false, mouseOffset=null;
function getMouseOffset(o,e){
var _oPos=getPosition(o), _mPos=mouseCoords(e);
return {x:_mPos.x-_oPos.x,y:_mPos.y-_oPos.y};
}
function getPosition(o){
var left=0, top=0;
while(o.offsetParent){
left+=o.offsetLeft+(o.currentStyle?(o.currentStyle.borderLeftWidth*1).NaN0():0);
top +=o.offsetTop +(o.currentStyle?(o.currentStyle.borderTopWidth*1).NaN0():0);
o=o.offsetParent;
}
left+=o.offsetLeft+(o.currentStyle?(o.currentStyle.borderLeftWidth*1).NaN0():0);
top+=o.offsetTop+(o.currentStyle?(o.currentStyle.borderTopWidth*1).NaN0():0);
return {x:left,y:top};
}
function mouseCoords(e){
if(e.pageX||e.pageY){ return {x:e.pageX,y:e.pageY}; }
return {x:e.clientX+document.body.scrollLeft-document.body.clientLeft,y:e.clientY+document.body.scrollTop-document.body.clientTop};
}
var oDrag=document.getElementById(‘aaa‘); if(!oDrag) return;
oDrag. bDrag=true;
e=e||window.event;
mouseOffset=getMouseOffset(this,e); return false;
}
oDrag. if(!bDrag)return;
e=e||window.event;
var _mPos = mouseCoords(e);
oDrag.style.left=(_mPos.x - mouseOffset.x)+‘px‘;
oDrag.style.top= (_mPos.y - mouseOffset.y)+‘px‘;
return false;
}
oDrag. bDrag = false; mouseOffset=null;}
var arm_img=document.getElementById(‘emergencyImg‘)
cvi_map.add(arm_img,{areacolor: ‘#FFFF00‘, bordercolor: ‘#60F‘,nofade:‘true‘ });
canvahtml=document.getElementById("emergencyImg_canvas").innerHTML;
}
/***************************缩放测试**************************************/
//已经成功缩放并且全部调整好，缩放后高亮也出现了。只是方法比较BT，你需要自己到map.js里找更好的方式
function aa(){
var o=document.getElementById(‘emergencyImg‘)
cvi_map.remove(o);
var W1=o.offsetWidth,H1=o.offsetHeight;
var windowsWidth = document.documentElement.clientWidth * 0.7;
var windowHeight = document.documentElement.clientHeight * 0.7;
o.style.width=windowsWidth+‘px‘;o.style.height=windowHeight+‘px‘;
var W2=o.offsetWidth,H2=o.offsetHeight;
var rW=W2/W1, rH=H2/H1;
var areaLendth = document.getElementsByTagName(‘area‘).length;
for(var k=0;k<areaLendth;k++){
var coords=document.getElementsByTagName(‘area‘)[k].getAttribute(‘coords‘);
var arrCoords=coords.split(‘,‘);
for(var i=0;i<arrCoords.length;i++){
arrCoords[i]=i%2==0?parseInt(arrCoords[i]*rW):parseInt(arrCoords[i]*rH);
}
document.getElementsByTagName(‘area‘)[k].setAttribute(‘coords‘,arrCoords.join(‘,‘))
cvi_map.add(o,{areacolor: ‘#FFFF00‘, bordercolor: ‘#60F‘,nofade:‘true‘ });
}
}
</script>
</head>
<body>
<div id=aaa style="_position:relative;text-align:center;margin:auto auto;">
<img id="emergencyImg" src="autoResizeMap.png" border="0" width="1226" height="620" orgWidth="1226" orgHeight="620" usemap="#emergencyMap" />
<map name="emergencyMap" id="emergencyMap">
<area title="火灾事故专项应急预案详情" href="" shape="rect" coords="59,284,96,580" style="outline:none;" target="_blank" />
<area title="自然灾害专项应急预案" href="" shape="rect" coords="107,284,144,580" style="outline:none;" target="_blank" />
<area title="特种设备事故专项应急预案" href="" shape="rect" coords="152,284,189,580" style="outline:none;" target="_blank" />
<area title="机械伤害事故专项应急预案详情" href="" shape="rect" coords="197,284,234,580" style="outline:none;" target="_blank" />
<area title="触电事故专项应急预案详情" href="" shape="rect" coords="245,284,282,580" style="outline:none;" target="_blank" />
<area title="窒息专项应急预案详情" href="" shape="rect" coords="293,284,330,580" style="outline:none;" target="_blank" />
<area title="高处坠落事故专项应急预案详情" href="" shape="rect" coords="342,284,379,580" style="outline:none;" target="_blank" />
<area title="突发停电事故专项应急预案详情" href="" shape="rect" coords="392,284,429,580" style="outline:none;" target="_blank" />
<area title="食物中毒事件专项应急预案详情" href="" shape="rect" coords="438,284,475,580" style="outline:none;" target="_blank" />
<area title="突发性安全事件专项应急预案详情" href="" shape="rect" coords="488,284,525,580" style="outline:none;" target="_blank" />
<area title="流行性传染病专项应急预案详情" href="" shape="rect" coords="535,284,572,580" style="outline:none;" target="_blank" />
<area shape="rect" coords="1224,618,1226,620" alt="Image Map" style="outline:none;" title="Image Map" href="http://www.image-maps.com/index.php?aff=mapped_users_11407" />
</map>
</div>
<input type=button value=‘测试缩放‘ />
</body>
</html>使用的JS插件：
var canvascheck = document.createElement(‘canvas‘);
var isIE = window.navigator.systemLanguage&&(!document.documentMode||document.documentMode<9)?1:0;
var isI8 = isIE&&document.documentMode?1:0;
var isVM = isIE&&document.namespaces?1:0;
var isCV = canvascheck.getContext?1:0;
var isJG = 0, jg = new Array();
var canvahtml;
function showCoords(map,ele,x,y,w,h) {}
function getClassValue(classes,string){
var temp = 0; var pos = string.length;
for (var j=0;j<classes.length;j++) {
if (classes[j].indexOf(string) == 0) {
temp = Math.min(classes[j].substring(pos),100);
break;
}
}
return Math.max(0,temp);
}
function getClassRGBColor(classes,string,color){
var temp, val = color, pos = string.length;
for (var j=0;j<classes.length;j++) {
if (classes[j].indexOf(string) == 0) {
temp = classes[j].substring(pos);
val = temp.toLowerCase();
break;
}
}
if(!val.match(/^[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]$/i)) {val = color||‘000000‘; }
if(!isCV) {return val; }else {
function hex2dec(hex){return(Math.max(0,Math.min(parseInt(hex,16),255)));}
var cr=hex2dec(val.substr(0,2)),cg=hex2dec(val.substr(2,2)),cb=hex2dec(val.substr(4,2));
return cr+‘,‘+cg+‘,‘+cb;
}
}
function performRGBColor(val,color){
if(!val.match(/^#[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]$/i)) {val = color||‘#000000‘; }
if(!isCV) {return val.substr(1,6); }else {
function hex2dec(hex){return(Math.max(0,Math.min(parseInt(hex,16),255)));}
var cr=hex2dec(val.substr(1,2)),cg=hex2dec(val.substr(3,2)),cb=hex2dec(val.substr(5,2));
return cr+‘,‘+cg+‘,‘+cb;
}
}
function getClassAttribute(classes,string){
var temp = 0; var pos = string.length;
for (var j=0;j<classes.length;j++) {
if (classes[j].indexOf(string) == 0) {
temp = 1; break;
}
}
return temp;
}
function fadeCanvas(id,opac) {
var obj = document.getElementById(id);
if(obj.fading==1 && opac<=100) {
obj.style.opacity = opac/100; opac += 10;
window.setTimeout("fadeCanvas(‘"+id+"‘,"+opac+")",10);
}
}
function setAreaOver(obj,id,bd,co,op,nb,f,z) {
var a, i, j, d, c, o, b, n, l, r, v, u, x, y, p, context, k = 0, t = ‘‘, r = obj.getAttribute(‘rel‘), canvas = document.getElementById(id);
if(r!=null) {d = r.split(","); v = d.unshift(obj.id); }else {d = new Array(obj.id); }
function setAttr() {
if(l.indexOf(‘forcegroup‘)!=-1) {k = getClassAttribute(u,"forcegroup");}else {k=0;}
if(l.indexOf(‘iopacity‘)!=-1) {o = getClassValue(u,"iopacity")/100;}else {o=op;}
if(l.indexOf(‘iborder‘)!=-1) {b = getClassRGBColor(u,"iborder",bd);}else {b=bd;}
if(l.indexOf(‘icolor‘)!=-1) {c = getClassRGBColor(u,"icolor",co);}else {c=co;}
if(l.indexOf(‘noborder‘)!=-1) {n = getClassAttribute(u,"noborder");}else {n=nb;}
}
if(isVM) {
for(a=0;a<d.length;a++) {
obj = document.getElementById(d[a]); p = ‘‘, l = obj.className, u = l.split(" "), v = obj.coords.split(",");
if(k==0) {setAttr();}
if(obj.shape.toLowerCase()==‘rect‘) {
t += ‘<v:rect unselectable="on" strokeweight="1" filled="t" stroked="‘+(n<1?"t":"f")+‘" strokecolor="#‘+b+‘" style="zoom:1;margin:0;padding:0;display:block;position:absolute;left:‘+parseInt(v[0])+‘px;top:‘+parseInt(v[1])+‘px;width:‘+parseInt(v[2]-v[0])+‘px;height:‘+parseInt(v[3]-v[1])+‘px;"><v:fill color="#‘+c+‘" opacity="‘+o+‘" /></v:rect>‘;
}else if(obj.shape.toLowerCase()==‘circle‘) {
t += ‘<v:oval unselectable="on" strokeweight="1" filled="t" stroked="‘+(n<1?"t":"f")+‘" strokecolor="#‘+b+‘" style="zoom:1;margin:0;padding:0;display:block;position:absolute;left:‘+parseInt(v[0]-v[2])+‘px;top:‘+parseInt(v[1]-v[2])+‘px;width:‘+(parseInt(v[2])*2)+‘px;height:‘+(parseInt(v[2])*2)+‘px;"><v:fill color="#‘+c+‘" opacity="‘+o+‘" /></v:oval>‘;
}else {
for(j=2;j<v.length;j+=2) {p += parseInt(v[j])+‘,‘+parseInt(v[j+1])+‘,‘;}
t += ‘<v:shape unselectable="on" strokeweight="1" filled="t" stroked="‘+(n<1?"t":"f")+‘" strokecolor="#‘+b+‘" coordorigin="0,0" coordsize="‘+canvas.width+‘,‘+canvas.height+‘" path="m ‘+parseInt(v[0])+‘,‘+parseInt(v[1])+‘ l ‘+p+‘ x e" style="zoom:1;margin:0;padding:0;display:block;position:absolute;top:0px;left:0px;width:‘+canvas.width+‘px;height:‘+canvas.height+‘px;"><v:fill color="#‘+c+‘" opacity="‘+o+‘" /></v:shape>‘;
}
} canvas.innerHTML += t;
}else if(isCV) {
if(f<1) {canvas.fading = 0; canvas.style.opacity = 0;}
context = canvas.getContext("2d");
for(a=0;a<d.length;a++) {
obj = document.getElementById(d[a]); l = obj.className, u = l.split(" "), v = obj.coords.split(",");
if(k==0) {setAttr();} context.beginPath();
if(obj.shape.toLowerCase()==‘rect‘) {
context.rect(0.5+parseInt(v[0]),0.5+parseInt(v[1]),parseInt(v[2]-v[0]),parseInt(v[3]-v[1])); context.closePath();
}else if(obj.shape.toLowerCase()==‘circle‘) {
context.arc(0.5+parseInt(v[0]),0.5+parseInt(v[1]),parseInt(v[2]),0,(Math.PI/180)*360,false);
}else {
context.moveTo(parseInt(v[0]),parseInt(v[1])); for(j=2;j<v.length;j+=2) {context.lineTo(parseInt(v[j]),parseInt(v[j+1]));} context.closePath();
}
context.fillStyle = ‘rgba(‘+c+‘,‘+o+‘)‘; context.strokeStyle = ‘rgba(‘+b+‘,1)‘; context.fill(); if(n<1) {context.stroke();}
} if(f<1) {canvas.fading = 1; fadeCanvas(id,0);}
}else {
o = op; l = obj.className; u = l.split(" ");
if(l.indexOf(‘forcegroup‘)!=-1) { k = getClassAttribute(u,"forcegroup");
if(k!=0) {if(l.indexOf(‘iopacity‘)!=-1) {o = getClassValue(u,"iopacity")/100; k=0;}}}
if(isIE) {canvas.style.filter = "Alpha(opacity="+(o*100)+")";}else {canvas.style.opacity = o; canvas.style.MozOpacity = o; canvas.style.KhtmlOpacity = o;}
for(a=0;a<d.length;a++) {
obj = document.getElementById(d[a]); l = obj.className, u = l.split(" "), v = obj.coords.split(",");
if(k==0) {
if(l.indexOf(‘forcegroup‘)!=-1) {k = getClassAttribute(u,"forcegroup");}else {k=0;}
if(l.indexOf(‘icolor‘)!=-1) {c = getClassRGBColor(u,"icolor",co);}else {c=co;}
} jg[z].setColor("#"+c);
if(obj.shape.toLowerCase()==‘rect‘) {
jg[z].fillRect(parseInt(v[0]),parseInt(v[1]),parseInt(v[2]-v[0])+1,parseInt(v[3]-v[1])+1);
}else if(obj.shape.toLowerCase()==‘circle‘) {
jg[z].fillEllipse(parseInt(v[0]-v[2]),parseInt(v[1]-v[2]),parseInt(v[2])*2+1,parseInt(v[2])*2+1);
}else {x = new Array(); y = new Array(); i = 0; for(j=0;j<v.length;j+=2) {x[i] = parseInt(v[j]); y[i] = parseInt(v[j+1]); i++;} jg[z].fillPolygon(x,y);
} jg[z].paint();
}
}
}
function setAreaOut(obj,id,f,z) {
var canvas = document.getElementById(id);
if(isVM) {
//var cn=canvas.childNodes;
//canvas.removeChild(cn.item(cn.length-1));
canvas.innerHTML=canvahtml;
}
else
if(isJG) {jg[z].clear();}else if(isCV) {
var context = canvas.getContext("2d");
context.clearRect(0,0,canvas.width,canvas.height);
}
}
function extAreaOver(image,area) {
var img = document.getElementById(image);
var obj = document.getElementById(area);
var cav = document.getElementById(img.canvasid);
var bc = performRGBColor(img.options[‘bordercolor‘],‘#0000ff‘);
var ac = performRGBColor(img.options[‘areacolor‘],‘#000000‘);
var op = img.options[‘opacity‘]/100;
if(img && obj && cav) setAreaOver(obj,img.canvasid,bc,ac,op,img.options[‘noborder‘],img.options[‘nofade‘],img.jg);
}
function extAreaOut(image,area) {
var img = document.getElementById(image);
var obj = document.getElementById(area);
var cav = document.getElementById(img.canvasid);
if(img && obj && cav) setAreaOut(obj,img.canvasid,img.options[‘nofade‘],img.jg);
}
function getCoords(e,n,a,i,x,y,w,h,pw,ph) {
var t, o, ox, oy, ex, ey, cx, cy, px=0, py=0;
if (!e) {e = window.event; }
if (e.pageX || e.pageY) {px = e.pageX; py = e.pageY;}
ex = e.clientX; ey = e.clientY;
if(self.pageXOffset||self.pageYOffset) {
ox = self.pageXOffset; if(ox>0 && px==ex) {ex -= ox; }
oy = self.pageYOffset; if(oy>0 && py==ey) {ey -= oy; }
}else if(document.documentElement) {
ox = document.documentElement.scrollLeft;
oy = document.documentElement.scrollTop;
}else if(document.body) {
ox = document.body.scrollLeft; oy = document.body.scrollTop;
}
if(document.body.scrollHeight!=ph||document.body.scrollWidth!=pw) {
var o = document.getElementById(i);
var t = findPosXY(o); x = t.x; y = t.y;
}
cx = Math.min(Math.max(ex+ox-x,0),w);
cy = Math.min(Math.max(ey+oy-y,0),h);
showCoords(n,a,cx,cy,w,h);
}
function findPosXY(ele) {
var t; var d = {x:ele.offsetLeft, y:ele.offsetTop };
if(ele.offsetParent) { t = findPosXY(ele.offsetParent); d.x += t.x; d.y += t.y;}
return d;
}
function roundedRect(ctx,x,y,width,height,radius,nopath){
if (!nopath) ctx.beginPath();
ctx.moveTo(x,y+radius);
ctx.lineTo(x,y+height-radius);
ctx.quadraticCurveTo(x,y+height,x+radius,y+height);
ctx.lineTo(x+width-radius,y+height);
ctx.quadraticCurveTo(x+width,y+height,x+width,y+height-radius);
ctx.lineTo(x+width,y+radius);
ctx.quadraticCurveTo(x+width,y,x+width-radius,y);
ctx.lineTo(x+radius,y);
ctx.quadraticCurveTo(x,y,x,y+radius);
if (!nopath) ctx.closePath();
}
function getRadius(radius,width,height){
var part = (Math.min(width,height)/100);
radius = Math.max(Math.min(100,radius/part),0);
return radius + ‘%‘;
}
var cvi_map = {
defaultRadius : 0,
defaultOpacity : 33,
defaultBordercolor : ‘#0000ff‘,
defaultAreacolor : ‘#000000‘,
defaultNoborder : false,
defaultNofade : false,
defaultShowcoords : false,
defaultImgsrc : ‘‘,
defaultMapid : ‘‘,
defaultDelayed : false,
add: function(image, options) {
var w=image.offsetWidth;
var h=image.offsetHeight;
var map, mapname = image.useMap.split("#");
if(mapname[1]!=‘‘&&mapname[1].length>=1) {map = document.getElementsByName(mapname[1])[0];}
if(image.tagName.toUpperCase() == "IMG" && map) {
var defopts = { "radius" : cvi_map.defaultRadius, "opacity" : cvi_map.defaultOpacity, "bordercolor" : cvi_map.defaultBordercolor, "areacolor" : cvi_map.defaultAreacolor, "noborder" : cvi_map.defaultNoborder, "nofade" : cvi_map.defaultNofade, "showcoords" : cvi_map.defaultShowcoords, "imgsrc" : cvi_map.defaultImgsrc, "mapid" : cvi_map.defaultMapid, "delayed" : cvi_map.defaultDelayed };
if(options) {
for(var i in defopts) { if(!options[i]) { options[i] = defopts[i]; }}
}else {
options = defopts;
}
var imageWidth = (‘iwidth‘ in options) ? parseInt(options.iwidth) : image.width;
var imageHeight = (‘iheight‘ in options) ? parseInt(options.iheight) : image.height;
try {
var object = image.parentNode;
object.style.position = (object.style.position==‘static‘||object.style.position==‘‘?‘relative‘:object.style.position);
object.style.height = image.height+‘px‘;
object.style.width = image.width+‘px‘;
object.style.padding = 0+‘px‘;
object.style.MozUserSelect = "none";
object.style.KhtmlUserSelect = "none";
object.unselectable = "on";
var blind, bgrnd, canvas; image.jg = 0;
if(isVM) {
if(document.namespaces[‘v‘]==null) {
var e=["shape","shapetype","group","background","path","formulas","handles","fill","stroke","shadow","textbox","textpath","imagedata","line","polyline","curve","roundrect","oval","rect","arc","image"],s=document.createStyleSheet();
for(var i=0; i<e.length; i++) {s.addRule("v\\:"+e[i],"behavior: url(#default#VML);");} document.namespaces.add("v","urn:schemas-microsoft-com:vml");
}
canvas = document.createElement([‘<var style="zoom:1;overflow:hidden;display:block;width:‘+image.width+‘px;height:‘+image.height+‘px;padding:0;">‘].join(‘‘));
bgrnd = document.createElement([‘<var style="zoom:1;overflow:hidden;display:block;width:‘+image.width+‘px;height:‘+image.height+‘px;padding:0;">‘].join(‘‘));
dummy = document.createElement([‘<var style="zoom:1;overflow:hidden;display:block;width:‘+image.width+‘px;height:‘+image.height+‘px;padding:0;">‘].join(‘‘));// NEW
}else if(isCV) {
canvas = document.createElement(‘canvas‘);
bgrnd = document.createElement(‘canvas‘);
}else {
canvas = document.createElement(‘div‘);
bgrnd = document.createElement(‘img‘);
bgrnd.src = image.src;
if(typeof(window[‘jsGraphics‘]) !== ‘undefined‘) {
image.jg = parseInt(jg.length);
jg[image.jg] = new jsGraphics(canvas); isJG = 1;
}
}
canvas.id = image.id+‘_canvas‘;
canvas.style.height = image.height+‘px‘;
canvas.style.width = image.width+‘px‘;
canvas.height = image.height;
canvas.width = image.width;
canvas.left = 0; canvas.top = 0;
canvas.style.position = ‘absolute‘;
canvas.style.left = 0+‘px‘;
canvas.style.top = 0+‘px‘;
canvas.fading = 0;
image.className = ‘‘;
image.style.cssText = ‘‘;
image.left = 0; image.top = 0;
image.style.position = ‘absolute‘;
/***********这里***************/
image.style.height = h+‘px‘;
image.style.width = w+‘px‘;
/***************************/
image.style.left = 0+‘px‘;
image.style.top = 0+‘px‘;
image.style.MozUserSelect = "none";
image.style.KhtmlUserSelect = "none";
image.unselectable = "on";
image.options = options;
image.canvasid = image.id+‘_canvas‘;
image.dummyid = image.id+‘_dummy‘; // NEW
image.bgrndid = image.id+‘_image‘;
image.blindid = map.name+‘_blind‘;
image.mapname = map.name;
image.areas = map.innerHTML;
image.active = false;
if(isIE) {image.style.filter = "Alpha(opacity=0)";}else {image.style.opacity = 0; image.style.MozOpacity = 0; image.style.KhtmlOpacity = 0;}
bgrnd.id = image.bgrndid;
bgrnd.left = 0; bgrnd.top = 0;
bgrnd.style.position = ‘absolute‘;
bgrnd.style.height = image.height+‘px‘;
bgrnd.style.width = image.width+‘px‘;
bgrnd.style.left = 0+‘px‘;
bgrnd.style.top = 0+‘px‘;
bgrnd.height = image.height;
bgrnd.width = image.width;
blind = document.createElement(‘div‘);
blind.id = image.blindid;
blind.className = "blind_area";
blind.left = 0; blind.top = 0;
blind.style.position = ‘absolute‘;
blind.style.height = image.height+‘px‘;
blind.style.width = image.width+‘px‘;
blind.style.left = 0+‘px‘;
blind.style.top = 0+‘px‘;
blind.innerHTML = " ";
object.insertBefore(canvas,image);
object.insertBefore(bgrnd,canvas);
object.insertBefore(blind,image);
cvi_map.modify(image, options);
} catch (e) {}
}
},
modify: function(image, options) {
try {
var radius = (typeof options[‘radius‘]==‘number‘?options[‘radius‘]:image.options[‘radius‘]); image.options[‘radius‘]=radius;
var opacity = (typeof options[‘opacity‘]==‘number‘?options[‘opacity‘]:image.options[‘opacity‘]); image.options[‘opacity‘]=opacity;
var bcolor = (typeof options[‘bordercolor‘]==‘string‘?options[‘bordercolor‘]:image.options[‘bordercolor‘]); image.options[‘bordercolor‘]=bcolor;
var acolor = (typeof options[‘areacolor‘]==‘string‘?options[‘areacolor‘]:image.options[‘areacolor‘]); image.options[‘areacolor‘]=acolor;
var noborder = (typeof options[‘noborder‘]==‘boolean‘?options[‘noborder‘]:image.options[‘noborder‘]); image.options[‘noborder‘]=noborder;
var nofade = (typeof options[‘nofade‘]==‘boolean‘?options[‘nofade‘]:image.options[‘nofade‘]); image.options[‘nofade‘]=nofade;
var showcoords = (typeof options[‘showcoords‘]==‘boolean‘?options[‘showcoords‘]:image.options[‘showcoords‘]); image.options[‘showcoords‘]=showcoords;
var delayed = (typeof options[‘delayed‘]==‘boolean‘?options[‘delayed‘]:image.options[‘delayed‘]); image.options[‘delayed‘]=delayed;
var imgsrc = (typeof options[‘imgsrc‘]==‘string‘?options[‘imgsrc‘]:image.options[‘imgsrc‘]); image.options[‘imgsrc‘]=imgsrc;
var mapid = (typeof options[‘mapid‘]==‘string‘?options[‘mapid‘]:image.options[‘mapid‘]); image.options[‘mapid‘]=mapid;
/*******************还有这里***************************************/
var context, func, ih = image.offsetHeight, iw = image.offsetWidth;
/*******************************************************************/
var radius = parseInt(Math.min(Math.min(iw/4,ih/4),radius));
var opacity = opacity==0?0.33:opacity/100;
var bcolor = performRGBColor(bcolor,‘#0000ff‘);
var acolor = performRGBColor(acolor,‘#000000‘);
var canvas = document.getElementById(image.canvasid);
var dummy = document.getElementById(image.dummyid);
var bgrnd = document.getElementById(image.bgrndid);
var map = document.getElementsByName(image.mapname)[0];
var opac = 100;
function replace() {
if(mapid!=‘‘) {
var tmp = document.getElementById(mapid);
if(tmp) {map.innerHTML = tmp.innerHTML;}
}else {
map.innerHTML = image.areas;
}
}
function prepare() {
if(!delayed) {replace();}
for(var j=0;j<map.areas.length;j++) {
if(map.areas[j].shape.match(/(rect|poly|circle)/i)) {
if(window.opera||map.areas[j].coords!=‘‘) {
if(map.areas[j].id==‘‘) {map.areas[j].id = image.mapname+‘_‘+j;}
if(isVM||isIE) {
setAreaOver(map.areas[j],canvas.id,"#FFFFFF","#FFFF00","0.4","true",nofade,image.jg);
func=map.areas[j]. if(func!=null) {tmp=String(func); func=(tmp.indexOf(‘function‘)>=0?tmp.match(/\{([^}]+)\}/):tmp); func=(typeof(func)==‘object‘?func[1]:func);}
map.areas[j]. = new Function(‘setAreaOver(this,"‘+canvas.id+‘","‘+bcolor+‘","‘+acolor+‘",‘+opacity+‘,‘+noborder+‘,‘+nofade+‘,‘+image.jg+‘);‘+func);
func=map.areas[j]. if(func!=null) {tmp=String(func); func=(tmp.indexOf(‘function‘)>=0?tmp.match(/\{([^}]+)\}/):tmp); func=(typeof(func)==‘object‘?func[1]:func);}
map.areas[j]. = new Function(‘setAreaOut(this,"‘+canvas.id+‘",‘+nofade+‘,‘+image.jg+‘);‘+func);
}else {
func = map.areas[j].getAttribute(" map.areas[j].setAttribute("onmouseover","setAreaOver(this,‘"+canvas.id+"‘,‘"+bcolor+"‘,‘"+acolor+"‘,"+opacity+","+noborder+","+nofade+","+image.jg+");"+func);
func = map.areas[j].getAttribute(" map.areas[j].setAttribute("onmouseout","setAreaOut(this,‘"+canvas.id+"‘,"+nofade+","+image.jg+");"+func);
}
}
}
}
if(showcoords) {
var atr, t = findPosXY(image), ph = document.body.scrollHeight, pw = document.body.scrollWidth;
if(isVM||isIE) {
image. = new Function(‘getCoords(event,"‘+image.mapname+‘",0,"‘+image.id+‘",‘+t.x+‘,‘+t.y+‘,‘+iw+‘,‘+ih+‘,‘+pw+‘,‘+ph+‘);‘+image.movefunc);
}else {
image.setAttribute("onmousemove","getCoords(event,‘"+image.mapname+"‘,0,‘"+image.id+"‘,"+t.x+","+t.y+","+iw+","+ih+","+pw+","+ph+");"+image.movefunc);
}
if(map.length>0) {
for(var j=0;j<map.areas.length;j++) {
if(map.areas[j].shape.match(/(rect|poly|circle)/i)) {
if(window.opera||map.areas[j].coords!=‘‘) {
atr = map.areas[j].id;
if(isVM||isIE) {
func=map.areas[j]. if(func!=null) {tmp=String(func); func=(tmp.indexOf(‘function‘)>=0?tmp.match(/\{([^}]+)\}/):tmp); func=(typeof(func)==‘object‘?func[1]:func);}
map.areas[j]. = new Function(‘getCoords(event,"‘+image.mapname+‘","‘+atr+‘","‘+image.id+‘",‘+t.x+‘,‘+t.y+‘,‘+iw+‘,‘+ih+‘,‘+pw+‘,‘+ph+‘);‘+func);
}else {
func = map.areas[j].getAttribute(" map.areas[j].setAttribute("onmousemove","getCoords(event,‘"+image.mapname+"‘,‘"+atr+"‘,‘"+image.id+"‘,"+t.x+","+t.y+","+iw+","+ih+","+pw+","+ph+");"+func);
}
}
}
}
}
}
}
if(canvas && bgrnd && map) {
if(isCV) {
context = canvas.getContext("2d");
context.clearRect(0,0,canvas.width,canvas.height);
}else if(isVM) {
canvas.innerHTML = ‘‘;
}else {
if(isIE) {canvas.style.filter = "Alpha(opacity="+(opacity*100)+")";}else { canvas.style.opacity = opacity; canvas.style.MozOpacity = opacity; canvas.style.KhtmlOpacity = opacity;}
if(isJG) {jg[image.jg].clear();}
}
if(delayed) {replace(); }
if(isCV) {
if(imgsrc!=‘‘) {
var img = new Image();
img.onload = function() {
context = bgrnd.getContext("2d");
context.clearRect(0,0,bgrnd.width,bgrnd.height);
context.save();
if(radius>0) {
roundedRect(context,0,0,bgrnd.width,bgrnd.height,radius);
context.clip();
}
context.fillStyle = ‘rgba(0,0,0,0)‘;
context.fillRect(0,0,bgrnd.width,bgrnd.height);
context.drawImage(img,0,0,bgrnd.width,bgrnd.height);
context.restore();
prepare();
}
img.src = imgsrc;
}else {
context = bgrnd.getContext("2d");
context.clearRect(0,0,bgrnd.width,bgrnd.height);
context.save();
if(radius>0) {
roundedRect(context,0,0,bgrnd.width,bgrnd.height,radius);
context.clip();
}
context.fillStyle = ‘rgba(0,0,0,0)‘;
context.fillRect(0,0,bgrnd.width,bgrnd.height);
context.drawImage(image,0,0,bgrnd.width,bgrnd.height);
context.restore();
prepare();
}
}else if(isVM) {
if(radius>0) {radius = getRadius(radius,bgrnd.width,bgrnd.height);}
bgrnd.innerHTML = ‘<v:roundrect arcsize="‘+radius+‘" strokeweight="0" filled="t" stroked="f" fillcolor="#ffffff" style="zoom:1;margin:0;padding:0;display:block;position:absolute;left:0px;top:0px;width:‘+bgrnd.width+‘px;height:‘+bgrnd.height+‘px;"><v:fill src="‘+(imgsrc!=‘‘?imgsrc:image.src)+‘" type="frame" /></v:roundrect>‘;
prepare();
}else {
bgrnd.src = imgsrc!=‘‘?imgsrc:image.src;
prepare();
} image.active = true;
if(isVM||isIE) {
func = image. if(func!=null) {tmp=String(func); func=(tmp.indexOf(‘function‘)>=0?tmp.match(/\{([^}]+)\}/):tmp); func=(typeof(func)==‘object‘?func[1]:func);} image.movefunc = func;
}else {
image.movefunc = image.getAttribute(" }
}
} catch (e) {}
},
remove : function(image) {
var ele, object = image.parentNode;
if(image.active) {
if(isIE) { image.style.filter = "Alpha(opacity=100)";}else {image.style.opacity = 100; image.style.MozOpacity = 100; image.style.KhtmlOpacity = 100;}
ele = document.getElementsByName(image.mapname)[0]; ele.innerHTML = image.areas; image.active = false; image.areas = ‘‘;
if(isVM||isIE) {image. = image.movefunc;}else {image.setAttribute("onmousemove",image.movefunc);}
ele = document.getElementById(image.canvasid); if(ele) {object.removeChild(ele);}
ele = document.getElementById(image.blindid); if(ele) {object.removeChild(ele);}
ele = document.getElementById(image.bgrndid); if(ele) {object.removeChild(ele);}
}
}
} 显示的效果图：
本文出自 “尘风随影的天空” 博客，请务必保留此出处http://genuinecx.blog.51cto.com/2890523/1394402
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