http://www.jb51.net/article/61113.htm（转载出处）
setTimeout和clearTimeou
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<html> <head> <title>进度条</title> <style type="text/css"> .container{ 450px; border:1px solid #6C9C2C; height:25px; }#bar{ background:#95CA0D; float:left; height:100%; text-align:center; line-height:150%; } </style> <script type="text/javascript"> function run(){ var bar = document.getElementById("bar"); var total = document.getElementById("total"); bar.style.width=parseInt(bar.style.width) + 1 + "%"; total.innerHTML = bar.style.width; if(bar.style.width == "100%"){ window.clearTimeout(timeout); return; } var timeout=window.setTimeout("run()",100); } window.onload = function(){ run(); } </script> </head> <body> <div class="container"> <div id="bar" style="0%;"></div> </div> <span id="total"></span> </body> </html> |
效果图：
<html> <head> <title>进度条</title> <style type="text/css"> .processcontainer{ 450px; border:1px solid #6C9C2C; height:25px; } #processbar{ background:#95CA0D; float:left; height:100%; text-align:center; line-height:150%; } </style> <script type="text/javascript"> function setProcess(){ var processbar = document.getElementById("processbar"); processbar.style.width = parseInt(processbar.style.width) + 1 + "%"; processbar.innerHTML = processbar.style.width; if(processbar.style.width == "100%"){ window.clearInterval(bartimer); } } var bartimer = window.setInterval(function(){setProcess();},100); window.onload = function(){ bartimer; } </script> </head> <body> <div class="processcontainer"> <div id="processbar" style="0%;"></div> </div> </body> </html> |
效果图：
3.setTimeout和setInterval区别
setTimeout() 只执行 code 一次。如果要多次调用，请使用 setInterval() ，setInterval() 方法会不停地调用函数，直到 clearInterval() 被调用或窗口被关闭，或者让 code 自身再次调用 setTimeout()。
希望本文所述对大家的javascript程序设计有所帮助。