function searchsubmit() {
	var fH=document.getElementById("frm_Search");
	var format = /^2[0-9]{3}-[0-9]{1,2}-[0-9]{1,2}$/;

	if (fH.city_name.value==''){alert("Please choose a city!");fH.city_name.focus();return false;}
	if (fH.arrivalDate.value.length==0){alert("Please input you check-in date!");return false;}
	if (!format.test(fH.arrivalDate.value)){alert("Check-in date format type should be: YYYY-MM-DD,please check your date format!");return false;}
	if (fH.departureDate.value.length==0){alert("Please input you check-out date!");return false;}
	if (!format.test(fH.departureDate.value)){alert("Check-out date format type should be: YYYY-MM-DD,please check your date format!");return false;}

	return true;
}