function checkValues(){

	var retVal = 0;
	var f = document.getElementById("price_from");
	var t = document.getElementById("price_to");
	
	if(f.value.length > 0 && t.value.length == 0){
		alert("Please either fill in the to field, or remove your from criteria");
		retVal = 1;
		}

	return retVal;
}