function ValidForm(form) {
 
	if(form.In_Month.selectedIndex ==0){
		alert("檢查入住日期");
		form.In_Month.focus();
		return false;
		}
	if(form.In_Date.selectedIndex ==0){
		alert("檢查入住日期");
		form.In_Date.focus();
		return false;
		}
if(form.In_Year.selectedIndex ==0){
		alert("檢查入住日期");
		form.In_Year.focus();
		return false;
		}
if(form.Out_Month.selectedIndex ==0){
		alert("檢查離開日期");
		form.Out_Month.focus();
		return false;
		}
if(form.Out_Date.selectedIndex ==0){
		alert("檢查離開日期");
		form.Out_Date.focus();
		return false;
		}
if(form.Out_Year.selectedIndex ==0){
		alert("檢查離開日期");
		form.Out_Year.focus();
		return false;
		}
 
if(form.Number_Of_Rooms.selectedIndex ==0){
		alert("檢查房間數");
		form.Number_Of_Rooms.focus();
		return false;
		}
if(form.Room_Required.selectedIndex ==0){
		alert("檢查客房類型");
		form.Room_Required.focus();
		return false;
		}
		return true;		
}