event在IE和FF不兼容，今天传参碰到些问题，参考网上的一些方法，有所心得：
aClassArray[i].onmouseover = function () { //代码直接写在里面是可以的，要传参也可以传，只是不方便复用 }; aClassArray[i].onmouseover =linkMouseover//不传参的情况下是可以用的，但后续不能用 arguments.callee.caller.arguments[0] aClassArray[i].onmouseover =linkMouseover()//加括号是错误用法 aClassArray[i].onmouseover = function () { linkMouseover(this) };//this能传进去，可以alert出来，但evt.clientX + "px"就出问题了，是空的。。。 arguments.callee.caller.arguments[0]//可以用这个解决 var src = evt.srcElement || evt.target; //后续还可以跟src
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附上练习代码
<!DOCTYPE html> <html> <head> <title></title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" href="css/ui-lightness/jquery-ui-1.10.4.custom.css" rel="external nofollow" /> <script src="js/jquery-1.10.2.js"></script> <script src="js/jquery-ui-1.10.4.custom.js"></script> <style type="text/css"> .aClass, .aClass:visited { font-size: 36px; text-decoration: none; color: #0094ff; } .divTips { font-size: 20px; color: red; border: #f00 1px solid; position: absolute; width: 100px; height: 30px; } </style> <script type="text/javascript"> function initOnOver() { var titleTips = { "baidu": "百度网站提示", "163": "163网站提示", "google": "google网站提示" } var aTag = document.getElementsByTagName("a"); var aClassArray = []; for (var i = 0; i < aTag.length; i++) { if (aTag[i].className == "aClass") { aClassArray[aClassArray.length] = aTag[i]; } } for (var i = 0; i < aClassArray.length; i++) { var e; aClassArray[i].onmouseover = function () { linkMouseover() }; aClassArray[i].onmouseout = linkMouseout; } } function linkMouseover() { var divTips = document.createElement("div"); var evt = window.event || arguments.callee.caller.arguments[0]; // 获取event对象 divTips.className = "divTips"; divTips.style.left = evt.clientX + "px";//+px兼容FF divTips.style.top = evt.clientY + "px";//+px兼容FF divTips.innerHTML = "test"; document.getElementById("divA").appendChild(divTips); } function linkMouseout() { var divTag = document.getElementsByTagName("div"); for (var i = 0; i < divTag.length; i++) { if (divTag[i].className == "divTips") { document.getElementById("divA").removeChild(divTag[i]); } } } window.onload = initOnOver; </script> </head> <body> <div id="divA"> <a href="http://www.baidu.com" rel="external nofollow">百度</a> <br /> <br /> <br /> <a href="http://www.163.com" rel="external nofollow">网易</a> <br /> <br /> <br /> <a href="http://www.google.com" rel="external nofollow">Google</a> </div> </body> </html>