两个时间比较大小,结束日期不能大于起始日期，起始日期不能大于当前日期

//选择日期

function change(obj){  
   var timeOne = $("#choose_one").val();
   var timeTwo = $("#choose_two").val();
   //获取当前时间
   var newdate= CurentTime();
   if(CompareDate(timeOne,timeTwo)){
	   layer.alert("开始时间不能大于结束时间");
	   $(obj).val("");
	   return false;
   }
   if(CompareDate(timeOne,newdate)){
	   layer.alert("开始时间不能大于当前时间");
	   $(obj).val("");
	   return false;
   }
   if(CompareDate(timeTwo,newdate)){
	   layer.alert("结束时间不能大于当前时间");
	   $(obj).val("");
	   return false;
   }
};

function CompareDate(d1,d2){
   return ((new Date(d1.replace(/-/g,"\/"))) > (new Date(d2.replace(/-/g,"\/"))));
 }

function CurentTime(){   
    var now = new Date();  
    var year = now.getFullYear();       //年  
    var month = now.getMonth() + 1;     //月  
    var day = now.getDate();            //日  
         
    var hh = now.getHours();            //时  
    var mm = now.getMinutes();          //分  
         
    var clock = year + "-";  
         
    if(month < 10) clock += "0";         
    clock += month + "-";  
         
    if(day < 10) clock += "0";   
    clock += day + " ";  
         
    if(hh < 10) clock += "0";  
    clock += hh + ":";  
  
    if (mm < 10) clock += '0';   
    clock += mm;  
    return(clock);   
}