<!-- 	Form validation for Dataworks search bar ------------------------>
<!-- 	Ensures Product ID search parameter is numeric ------------------>

function validate_search() {
	
	// Check for a blank search term
	if($('search_term').value == ""){
		alert("Please enter a search term.");
		return false;
	}
	
	// Check that PRODUCT ID search 
	if($('prodid_search').value == 'TRUE'){
		if(isNumber($('search_term').value)){
			return true;
		} else {
			alert("You must enter a number to complete a Product ID search.");
			return false;
		}
	}
	else
	{
		return true;
	}
	
}

function isNumber(str)
{
	var regex = /^[0-9]+$/;
	return regex.test(str);
}

<!----------------------------------------------------------------------->