function previewForm(type,tid,evid){
	alert(type);
		if(type<3){
			document.forms[0].preview.value=1;
			document.forms[0].submit();

			url="preview.php?type="+type+"&tid="+tid+"&evid="+evid;
			if(type==1)
				window.open(url,'','modal=yes,scrollbars=yes,menubar=no,height=400,width=800,resizable=yes,toolbar=no,location=no,status=no');
			else 
				window.open(url,'','modal=yes,scrollbars=yes,menubar=no,height=600,width=800,resizable=yes,toolbar=no,location=no,status=no');

		}else{
			url="preview.php?type="+type;
			window.open('events.php','','modal=yes,scrollbars=yes,menubar=no,height=600,width=800,resizable=yes,toolbar=no,location=no,status=no');
		}

	}