function popup(urlLink, windowname, winsize)
		{
			if (! window.focus)return true;
		
			var href;
			if (typeof(urlLink) == 'string')
				href=urlLink;
			else
				href=urlLink.href;
				
			window.open(href, windowname, winsize+',left=50,top=50,toolbar=0,location=0,status=0,menubar=0,scrollbars=1,resizable=1,dependent=1');
			return false;
			
		}


var isIE = document.all?true:false;
		var isNS = document.layers?true:false;
		function onlyDigits(e) {
		var _ret = true;
		if (isIE) {
		if (window.event.keyCode < 46 || window.event.keyCode > 57) {
		window.event.keyCode = 0;
		_ret = false;
		}
		}
		if (isNS) {
		if (e.which < 46 || e.which > 57) {
		e.which = 0;
		_ret = false;
		}
		}
		return (_ret); 
		}