参考了sina的代码,想出来的一个代码,请大家使用,不要传播,转载请注明:来自
<!--
//时间计算
varshowit=false;
vartoday=newDate();
varurlpath;
functiontestdate()
{
urlpath='http://www.scripthome.net/bbs';showit=true
if(today.getHours()>='10'&&today.getHours()<'12')
{
urlpath='https://www.jb51.net';showit=true
}
}
testdate();

varMSIE=navigator.userAgent.indexOf("MSIE");
varOPER=navigator.userAgent.indexOf("Opera");
if(showit==true)
{
if(document.all&&MSIE!=-1&&OPER==-1){
//thisisa4.xbrowser,no?
functionchangediv(){
document.getElementById('hiddenLayer').style.display="block";
document.getElementById('interstitialFrame').src=urlpath;
setTimeout("hidediv()",5000)
}
functionhidediv(){
document.getElementById('hiddenLayer').style.display="none";
SYtag=2;
}
functionshowfull(){
setTimeout("changediv()",2000);
}
showfull();
}}
if(showit==true)
{
if(document.all&&MSIE!=-1&&OPER==-1){
//thisisa4.xbrowser,no?
document.write('<DIVID="hiddenLayer"style="display:none;height:0">');

expandableIframe='<IFRAMEid="interstitialframe"width=0HEIGHT=0NORESIZESCROLLING=NoFRAMEBORDER=0MARGINHEIGHT=0MARGINWIDTH=0></IFRAME>';
document.write(expandableIframe);
}
document.write('</div>');
}
//-->