function IsNumber(Expression)
{
	Expression = Expression.toLowerCase();
	RefString = "0123456789.-";

	if (Expression.length < 1) 
		return (false);

	for (var i = 0; i < Expression.length; i++) 
	{
		var ch = Expression.substr(i, 1)
		var a = RefString.indexOf(ch, 0)
		if (a == -1)
			return (false);
	}
	return(true);
}

	function checkData(){
        
        var message="";
		if (document.Search_Form.Price.value!="" && IsNumber(document.Search_Form.Price.value) == false) 
		{
			message=message+"In the Price field please use only numeric values.\n";
		}
		if (document.Search_Form.PriceTo.value!="" && IsNumber(document.Search_Form.PriceTo.value) == false) 
		{
			message=message+"In the Price To field please use only numeric values.\n";
		}

		if (message.length>0)
		{
			alert(message);
			return false;
		}
		else
		{
			return true;
		}
	}