js小游戏——看你能坚持多久
点击另存用到的图片。
<!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" xml:lang="zh-cn" > <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <title>看你能坚持多久</title> <style type="text/css"> #top{ color:white; height:20px; } #time{ float:left; } #item{ float:left; border:solid 1px gray; width:100px; padding:0; margin:0 20px; } #item div{ background:yellow; width:0px; } input{ margin:0 10px; float:left; } #desc{float:left} body{background:black} </style> <script type="text/javascript"> window.onload = init; function init(){ time = 0; timeDiv = document.getElementById(‘time‘); input = document.getElementsByTagName(‘input‘)[0]; body = document.getElementById(‘body‘); input.addEventListener(‘click‘,wenzi); div = document.getElementById(‘item‘).firstChild; width = screen.width; } function action(){ var xx = document.createElement(‘img‘); xx.src = ‘./xingxing.gif‘; xx.style.width = random(10,100)+‘px‘; xx.style.position = ‘absolute‘; xx.style.left = random(0,width-100)+‘px‘; xx.style.top = random(20,600)+‘px‘; xx.onclick = del; body.appendChild(xx); time++; setTime(); setWidth(); isGameOver(); } function setTime(){ var timeText = document.createTextNode(‘时间:‘+Math.floor(time*0.5)); timeDiv.replaceChild(timeText,timeDiv.firstChild); } function setWidth(){ div.style.width = num()*5+‘px‘; var numText = document.createTextNode(num()); div.firstChild.replaceChild(numText,div.firstChild.firstChild); } function isGameOver(){ if(num()>=20){ clearInterval(clock); for(var i=0;i<document.images.length;i++){ (document.images)[i].onclick = ‘‘; } input.value="重新开始" alert(‘游戏结束,您坚持了‘+Math.floor(time*0.5)+‘秒‘); } } function random(x,y){ return Math.floor( Math.random() * (y-x+1) ) + x } function num(){ return document.images.length; } function del(){ body.removeChild(this); setWidth(); } function wenzi(){ if(input.value==‘开始‘){ input.value = ‘暂停‘; begin(); for(var i=0;i<document.images.length;i++){ document.images[i].onclick = del; } }else if(input.value==‘暂停‘){ input.value = ‘开始‘; clearInterval(clock); for(var i=0;i<document.images.length;i++){ (document.images)[i].onclick = ‘‘; } }else if(input.value==‘重新开始‘){ input.value = ‘暂停‘; while(body.hasChildNodes()) //当div下还存在子节点时 循环继续 { body.removeChild(body.firstChild); } time = 0; timeDiv.innerHTML=‘时间:0‘; begin(); } } function begin(){ clock = setInterval(‘action()‘,500); } </script> </head> <body> <div id="top"> <input type="button" value="开始"/> <div id="time">时间:0</div> <div id="item"><div><font color="red">0</font></div></div><div id="desc"><b>游戏说明:</b>点击消除星星,当星星数量达到20个时游戏结束。看你能坚持多久?</div> </div> <div id="body"></div> </body> </html>
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