JAVA SCRIPT TO VALIDATE TIME IN "dd-mm-yyyy hh:mm:ss" FORMAT

 function validateStartTime() {  
  //This function will validte the datetimes of this format : dd-mm-yyyy hh:mm:ss  
  var date  = document.getElementById("startTime").value.trim();  
   var valid  = true;  
   var spaceIndex = date.indexOf(" ");  
   var onlyDate = date.substring(0,spaceIndex);  
   var dateData = onlyDate.split("-");   
   var onlyTime = date.substring(spaceIndex);   
   var timeData = onlyTime.split(":");    
   var day  = (dateData[0]);     
   var month  = (dateData[1]);    
   var year  = (dateData[2]);    
   var hour  = (timeData[0]);    
   var min  = (timeData[1]);    
   var sec  = (timeData[2]);      
   var regForDate = new RegExp("\\d{1,2}-\\d{1,2}-\\d{4}$");  
   var regForTime = new RegExp("\\d{1,2}:\\d{1,2}:\\d{1,2}$");  
   if(!regForDate.test(onlyDate)) valid =false;  
   else if(!regForTime.test(onlyTime)) valid =false;  
   else if((month < 1) || (month > 12)) valid = false;  
   else if((day < 1) || (day > 31)) valid = false;  
   else if(((month == 4) || (month == 6) || (month == 9) || (month == 11)) && (day > 30)) valid = false;  
   else if((month == 2) && (((year % 400) == 0) || ((year % 4) == 0)) && ((year % 100) != 0) && (day > 29)) valid = false;  
   else if((month == 2) && ((year % 100) == 0) && (day > 29)) valid = false;  
   else if((hour < 0) || (hour > 24)) valid = false;  
   else if((min < 0) || (min > 59)) valid = false;  
   else if((sec < 0) || (sec > 59)) valid = false;       
  return valid;  
 }