本文实例讲述了JS判断iframe是否加载完成的方法。分享给大家供大家参考，具体如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title></title> </head> <body> <script type="text/javascript"> var isIE = /msie/i.test(navigator.userAgent) && !window.opera; var iframe = document.createElement("iframe"); iframe.src = "http://www.jb51.net/"; if (isIE) { iframe.onreadystatechange = function(){ if(iframe.readyState == "loaded" || iframe.readyState == "complete"){ alert("loaded"); } }; } else { iframe.onload = function(){ alert("loaded"); }; } document.body.appendChild(iframe); </script> </body> </html>
或者：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title></title> </head> <body> <script type="text/javascript"> var iframe = document.createElement("iframe"); iframe.src = "http://www.jb51.net/"; if (iframe.attachEvent){ iframe.attachEvent("onload", function(){ alert("loaded"); }); } else { iframe.onload = function(){ alert("loaded"); }; } document.body.appendChild(iframe); </script> </body> </html>
希望本文所述对大家JavaScript程序设计有所帮助。