function check_eat(va1,va2)
{
	var eatDate = $('eatdate').value;
	var eatTime = $('eat_time').value;
	var eatNums = $('eatnums').value;
	var eatTel = $('eattel').value;
	var eatMan = $('eatman').value;
	var eatAddress = $('eataddress').value;
	var eatEry = $('eatery').value;
	if(eatDate =="")
	{
		alert("就餐日期不能为空");
		$('eatdate').focus();
		return false;
		}
	if(!compareDate(va2,eatDate))
	{
			alert("就餐日期必须大于当前日期");
			$('eatdate').focus();
			return false;
	}
	if(parseFloat(comptime(eatTime,va1)) < 4.00)
	{
		$('message_time').innerHTML ="<font color='red'>就餐时间必须在四小时后生效</font>";
		$('eat_time').focus();
	    return false;	
	 }
	if(eatNums == "")
	{
		alert("就餐人数不能为空");
		$('eatnums').focus();
		return false;
		}
	if(eatTel == "")
	{
		alert("联系电话不能为空");
		$('eattel').focus();
		return false;
		}
	if(eatMan == "")
	{
		alert("联系人不能为空");
		$('eatman').focus();
		return false;
		}
	if(eatAddress == "")
	{
		alert("联系地址不能为空");
		$('eataddress').focus();
		return false;
		}
	else
	{ return true;}
}
function  comptime(a,b)   
  {   
  var   aParts   =   a.split(":"); 
  var   aMinutes   =   parseInt(aParts[0]*60)+parseInt(aParts[1]);   
  var   bParts   =   b.split(":");   
  var   bMinutes   =   parseInt(bParts[0]*60)+parseInt(bParts[1]);
  return  (aMinutes - bMinutes)/(60);   
}
function compareDate(DateOne,DateTwo)
 {
        
        var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ("-"));
        var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ("-")+1);
        var OneYear = DateOne.substring(0,DateOne.indexOf ("-"));
        
        var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ("-"));
        var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ("-")+1);
        var TwoYear = DateTwo.substring(0,DateTwo.indexOf ("-"));       	
		if (Date.parse(OneMonth+"/"+OneDay+"/"+OneYear) <= Date.parse(TwoMonth+"/"+TwoDay+"/"+TwoYear))
        {
        	return true;
        }
        else
       {
        	return false;
        }
        
 }
function checktextarea(obj){
var obj;
var max=60;
obj.value=obj.value.substring(0,max);
}