function popit(windowname)
{
if (document.popitform.r[0].checked) {x=640; y=480;};
if (document.popitform.r[1].checked) {x=800; y=600;};
if (document.popitform.r[2].checked) {x=1024; y=760;};
if (document.popitform.r[3].checked) {x=1600; y=1200;};
if (document.popitform.r[4].checked) {x=1152; y=864;};

pageurl=document.popitform.url.value;
if (pageurl.indexOf("://")==-1) {pageurl="http://"+pageurl};
windowstring="toolbar=yes,location=yes,directories=yes,status=no,menubar=yes,scrollbars=yes,resizable=yes,width="+x+",height="+y;
MyNewWindow=window.open(pageurl, windowname,windowstring);
}