功能非常实用,代码非常简单,就不多废话了,直接奉上:
<!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\"> <head> <meta http-equiv=\"Content-Type\" content=\"text/html; charset=gb2312\" /> <title>仿IE顶部的警告条,可以关闭</title> <style type=\"text/css\"> #informationbar{ position: fixed; left: 0; width: 100%; text-indent: 5px; padding: 5px 0; background-color: lightyellow; border-bottom: 1px solid black; font: bold 12px Verdana; } * html #informationbar{ /*IE6 hack*/ position: absolute; width: expression(document.compatMode==\"CSS1Compat\"? document.documentElement.clientWidth+\"px\" : body.clientWidth+\"px\"); } </style> <script type=\"text/javascript\"> function informationbar(){ this.displayfreq=\"always\" this.content=\'<a href=\"javascript:informationbar.close()\"><img src=\"close.gif\" style=\"width: 14px; height: 14px; float: right; border: 0; margin-right: 5px\" /></a>\' } informationbar.prototype.setContent=function(data){ this.content=this.content+data document.write(\'<div id=\"informationbar\" style=\"top: -500px\">\'+this.content+\'</div>\') } informationbar.prototype.animatetoview=function(){ var barinstance=this if (parseInt(this.barref.style.top)<0){ this.barref.style.top=parseInt(this.barref.style.top)+5+\"px\" setTimeout(function(){barinstance.animatetoview()}, 50) } else{ if (document.all && !window.XMLHttpRequest) this.barref.style.setExpression(\"top\", \'document.compatMode==\"CSS1Compat\"? document.documentElement.scrollTop+\"px\" : body.scrollTop+\"px\"\') else this.barref.style.top=0 } } informationbar.close=function(){ document.getElementById(\"informationbar\").style.display=\"none\" if (this.displayfreq==\"session\") document.cookie=\"infobarshown=1;path=/\" } informationbar.prototype.setfrequency=function(type){ this.displayfreq=type } informationbar.prototype.initialize=function(){ if (this.displayfreq==\"session\" && document.cookie.indexOf(\"infobarshown\")==-1 || this.displayfreq==\"always\"){ this.barref=document.getElementById(\"informationbar\") this.barheight=parseInt(this.barref.offsetHeight) this.barref.style.top=this.barheight*(-1)+\"px\" this.animatetoview() } } window.onunload=function(){ this.barref=null } </script> <script type=\"text/javascript\"> <!--Invocation code--> var infobar=new informationbar() infobar.setContent(\'敬告:明天中午12点天降钱雨,请备好麻袋! <a href=\"#\">购买麻袋</a> <a href=\"#\">购买麻袋</a>\') infobar.initialize() </script> </head> <body> </body> </html>
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