Validate Date

Snippet:

 var msie = window.document.documentMode;  
   
 /****  
  * Checks a controls value to see if it is a Date Value or not  
  *   
  * Parameters:  
  * @cntrl - String; the Control ID value  
  * @success - Function(); The Success function to execute  
  * @fail - Function(); The Fail function to execute  
  */  
 function ValidDate(cntrl, success, fail) {  
      var valid = false;  
   
      if (msie !== undefined) {  
           var dtString = cntrlIDs[cntrl].value;  
           var date = new Date(dtString);  
           if (!isNaN(date)) {  
                dtString = dtString.replace(/-/g, "/");  
                // Assumed pattern: MM/dd/CCYY  
                var parts = dtString.split("/")  
                var dd = parseInt(parts[1], 10); // Day Number  
                var mm = parseInt(parts[0], 10); // Month Number  
                var yr = parseInt(parts[2], 10); // Year Number  
   
                if (dd === date.getDate()  
                     && mm === (date.getMonth() + 1)     // Zero-based Calendar months  
                     && yr === date.getFullYear()) {  
                     //Only execute Success function, if AND ONLY if all date parts are equal  
                     valid = true;  
                }  
           }  
      } else {  
           if (Date.parse(cntrlIDs[cntrl].value)) {  
                valid = true;  
           }  
      }  
   
      if (valid) {  
           cntrlIDs[cntrl].classList.remove('invalid');  
   
           if ($.isFunction(success)) {  
                success();  
           }  
      } else {  
           cntrlIDs[cntrl].classList.add('invalid');  
   
           if ($.isFunction(fail)) {  
                fail();  
           }  
      }  
 }