function Get(){
var Then = new Date() 
Then.setTime(Then.getTime() + 1 * 60 * 1000 )
var cookieString = new String(document.cookie)
var cookieHeader = "shcl_popwin=" 
var beginPosition = cookieString.indexOf(cookieHeader)
if (beginPosition != -1){ 
} 
else 
{ 
document.cookie = "shcl_popwin=popwin;expires="+ Then.toGMTString()  
window.open('popwin.htm','','width=435,height=500,top=5,left=5,scrollbars=yes')
}
}
Get();