CSS渐变背景的6个演示代码

浏览数：32 / 时间：2015年06月09日

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
   <title>CSS渐变背景的6个演示代码 - 石家庄瑜伽老师培训</title>
<script>
var setGradient = (function(){
    var p_dCanvas = document.createElement(‘canvas‘);
    var p_useCanvas =  !!( typeof(p_dCanvas.getContext) == ‘function‘);
    var p_dCtx = p_useCanvas?p_dCanvas.getContext(‘2d‘):null;
    var p_isIE = /*@cc_on!@*/false;
   try{   p_dCtx.canvas.toDataURL() }catch(err){
          p_useCanvas = false ;
   };
         
    if(p_useCanvas){
       return function (dEl , sColor1 , sColor2 , bRepeatY ){
            if(typeof(dEl) == ‘string‘) dEl =  document.getElementById(dEl);
            if(!dEl) return false;
            var nW = dEl.offsetWidth;
            var nH = dEl.offsetHeight;
            p_dCanvas.width = nW;
            p_dCanvas.height = nH;
            var dGradient;
            var sRepeat;
            if(bRepeatY){
                dGradient = p_dCtx.createLinearGradient(0,0,nW,0);
                sRepeat = ‘repeat-y‘;
            }else{
                dGradient = p_dCtx.createLinearGradient(0,0,0,nH);
                sRepeat = ‘repeat-x‘;
            }        
            
            dGradient.addColorStop(0,sColor1);
            dGradient.addColorStop(1,sColor2);                
            
            p_dCtx.fillStyle = dGradient ; 
            p_dCtx.fillRect(0,0,nW,nH);
            var sDataUrl = p_dCtx.canvas.toDataURL(‘image/png‘);
            
            with(dEl.style){
                backgroundRepeat = sRepeat;
                backgroundImage = ‘url(‘ + sDataUrl + ‘)‘;
                backgroundColor = sColor2;    
            };
       }
    }else if(p_isIE){
        
        p_dCanvas = p_useCanvas = p_dCtx =  null;        
        return function (dEl , sColor1 , sColor2 , bRepeatY){
            if(typeof(dEl) == ‘string‘) dEl =  document.getElementById(dEl);
            if(!dEl) return false;
            dEl.style.zoom = 1;
            var sF = dEl.currentStyle.filter;
            dEl.style.filter += ‘ ‘ + [‘progid:DXImageTransform.Microsoft.gradient(    GradientType=‘,  +(!!bRepeatY ),‘,enabled=true,startColorstr=‘,sColor1,‘, endColorstr=‘,sColor2,‘)‘].join(‘‘);
    };
    
    }else{
        p_dCanvas = p_useCanvas = p_dCtx =  null;
        return function(dEl , sColor1 , sColor2  ){
            
            if(typeof(dEl) == ‘string‘) dEl =  document.getElementById(dEl);
            if(!dEl) return false;
            with(dEl.style){
             backgroundColor = sColor2; 
            };
        }
    }
})();
 </script>
<style>
  body{font:0.75em/1.4 Arial;text-align:left;margin:20px;}
  hr{clear:both;visibility:hidden;}
  xmp{font:12px/12px "Courier New";background:#fff;color:#666; border:solid 1px #ccc;}
  div.example{  border:solid 1px #555;margin:0 20px 20px 0;float:left; display:inline;margin:1em;background:#fff;width:300px;padding:40px;color:#222;font:xx-small/1.2 "Tahoma";text-align:justify;}
</style>
</head>
<body>
<div id="example1" class="example">潜水推流器</div>
  <div id="example2" class="example">潜水射流曝气机</div>
  <div id="example3" class="example">网页代码站</div>
  <div id="example4" class="example">网页代码站 </div>
  <div id="example5" class="example">潜水射流曝气机</div>
  <div id="example6" class="example">网页代码站</div>
<script>
setGradient(‘example1‘,‘#4ddbbe‘,‘#d449cc‘,1);
setGradient(‘example2‘,‘#46ddbd‘,‘#d8b617‘,0);
setGradient(‘example3‘,‘#c81fc1‘,‘#bf445f‘,1);
setGradient(‘example4‘,‘#2285e5‘,‘#d769eb‘,0);
setGradient(‘example5‘,‘#8b4286‘,‘#eac87d‘,1);
setGradient(‘example6‘,‘black‘,‘white‘,0);
</script>

<br />

</body>
</html>