popupWins = new Array();


function popup(theurl,height, width) {
var name='SelectWindow';
var defaultsize= 'height=120,width=430,';
var windowprops = "top=50,left=100,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,"; 
var vargs= '';
/******************************* 
the popupWins array stores an object reference for
each separate window that is called, based upon
the name attribute that is supplied as an argument
*******************************/
if (!(height)) {
   args=windowprops+defaultsize;
}
else {
   args=windowprops+'HEIGHT='+height+',WIDTH='+width;
}

if ( typeof( popupWins[name] ) != "object" ){
popupWins[name] = window.open(theurl,name,args);
} else {
if (!popupWins[name].closed){
popupWins[name].location.href = theurl;
} else {
popupWins[name] = window.open(theurl, name,args);
}
}

popupWins[name].focus();
}