JS 2つの日付サイズの比較

var beginDate=$("#beginDate").val();  
 var endDate=$("#endDate").val();  
 var d1 = new Date(beginDate.replace(/\-/g, "\/"));  
 var d2 = new Date(endDate.replace(/\-/g, "\/"));  
  
  if(beginDate!=""&&endDate!=""&&d1 >=d2)  
 {  
  alert("            ！");  
  return false;  
 }

   
   
   
   
   
   
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checkTime = function() {   
    var startTime = document.getElementById("startTime").value;   
    var endTime = document.getElementById("endTime").value;   
    compareCalendar(startTime, endTime);         
}   
//        
function compareDate(checkStartDate, checkEndDate) {      
    var arys1= new Array();      
    var arys2= new Array();      
if(checkStartDate != null && checkEndDate != null) {      
    arys1=checkStartDate.split('-');      
      var sdate=new Date(arys1[0],parseInt(arys1[1]-1),arys1[2]);      
    arys2=checkEndDate.split('-');      
    var edate=new Date(arys2[0],parseInt(arys2[1]-1),arys2[2]);      
if(sdate > edate) {      
    alert("            ");         
    return false;         
}  else {   
    alert("  ");   
    return true;      
    }   
    }      
}     
  
//    ，      
function compareTime(startDate, endDate) {   
 if (startDate.length > 0 && endDate.length > 0) {   
    var startDateTemp = startDate.split(" ");   
    var endDateTemp = endDate.split(" ");   
                   
    var arrStartDate = startDateTemp[0].split("-");   
    var arrEndDate = endDateTemp[0].split("-");   
  
    var arrStartTime = startDateTemp[1].split(":");   
    var arrEndTime = endDateTemp[1].split(":");   
  
var allStartDate = new Date(arrStartDate[0], arrStartDate[1], arrStartDate[2], arrStartTime[0], arrStartTime[1], arrStartTime[2]);   
var allEndDate = new Date(arrEndDate[0], arrEndDate[1], arrEndDate[2], arrEndTime[0], arrEndTime[1], arrEndTime[2]);   
                   
if (allStartDate.getTime() >= allEndDate.getTime()) {   
        alert("startTime    endTime，    ");   
        return false;   
} else {   
    alert("startTime  endTime，     ");   
    return true;   
       }   
} else {   
    alert("      ");   
    return false;   
      }   
}   
//    ，      
function compareCalendar(startDate, endDate) {   
if (startDate.indexOf(" ") != -1 && endDate.indexOf(" ") != -1 ) {   
    //    ，    
        compareTime(startDate, endDate);               
} else {   
    //     ，       
    compareDate(startDate, endDate);   
      }   
}