//helper function to make sure document.getElementById exists
//be nice and give a fallback to older IEs
function GetElementById (id){
	if (document.getElementById)
		return document.getElementById(id);
	else if (document.all)
		return document.all[id];
	else
		return null;
}

function CopyPopulateIfEmpty (sourceid, destid){
	var source = GetElementById(sourceid);
	var dest = GetElementById(destid);

	if(source == null || dest == null)
		return;

	if(dest.value != "")
		return;
				
//	alert('Populate '+destid+' with: ('+sourceid.value+')');
	dest.value = source.value;
}