问个控制弹出窗口的问题

[ksr12333]

请问如何用js操作cookies使弹出窗口半个小时内只弹出一次？试验了好久都不行，虚心请教各位:-)

[vivianfdlpw]

<script>
function gettime()
{
var dt=new Date();
dt=new Date(dt.getTime()+30*60*1000);
return dt;
}
function SetCookie(sName, sValue)
{
var dt=gettime();
document.cookie = sName + "=" + escape(sValue) + "; expires=" + dt.toGMTString();
}

function GetCookie(sName)
{
var aCookie = document.cookie.split("; ");
for (var i=0; i < aCookie.length; i++)
{
var aCrumb = aCookie[i].split("=");
if (sName == aCrumb[0])
return unescape(aCrumb[1]);
}
return null;
}


var ck=GetCookie('haveOpend');
if(!ck)
{
window.open('new.htm');
SetCookie('haveOpend', 'true');
}

</script>

[网事随逢]

mark...

[ksr12333]

好用，谢谢了，结贴给分