function modelesswin(url,mwidth,mheight)
{
  if (document.all&&window.print) //if ie5
     eval('window.showModelessDialog(url,"","help:0;resizable:1;dialogWidth:'+mwidth+'px;dialogHeight:'+mheight+'px")')
  else
     eval('window.open(url,"","width='+mwidth+'px,height='+mheight+'px,resizable=1,scrollbars=1")')
}

//To load via link, use something like below:
//<a href="javascript:modelesswin('http://yahoo.com',600,400)">Click here</a>