// JScript source code
function ForceNumber()
{	
	objField=document.form4.product_qty.value;
	var strField = new String(objField);
	var i = 0;
	for (i = 0; i < strField.length; i++)
		if (strField.charAt(i) < '0' || strField.charAt(i) > '9') 
		{
			alert("Quantity must be a valid numeric value between 1 and 999.");
			document.form4.product_qty.value="";
			document.form4.product_qty.focus();
			return false;
		}	
		if (objField == "0" || objField =="00" || objField == "000" || objField == "" ) 
		{
			alert("Quantity must be a valid numeric value between 1 and 999.");
			 document.form4.product_qty.value= "";
			document.form4.product_qty.focus();
		return false;
		}
	
	return true;
}