function helpWindow(url)
{
	window.open(url, "helpwindow", "width=500,height=450,scrollbars=no,resizable=no,status=no");
}

function newsWindow(url)
{
	window.open(url, "newswindow", "width=650,height=500,scrollbars=1,resizable=1,status=no");
}
function isNumeric(elem, helperMsg){
	var numericExpression = /^[0-9]+$/;
	if(elem.value.match(numericExpression)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}