Prevent default form action and do another one

Some time we need to perform an action rather than default form action. For this use the script given below.

 $('#YourformID').on('keyup keypress', function (e) {  
     var keyCode = e.keyCode || e.which;  
     if (keyCode === 13) {  
       e.preventDefault();  
       $(this).find('#YourActionButtonID').click();  
     }  
   });  

How to check a temporary table exists in SQL Server

Use this sql query

 IF OBJECT_ID('[Your_DB_Name..#[Temp_Table_Name]') IS NOT NULL   
 BEGIN  
      --Action--
 END  

Example

 IF OBJECT_ID('tempdb..#tempDoc') IS NOT NULL   
 BEGIN  
      Drop Table #tempDoc  
 END  

Modal popup over modal popup

Use the given jQuery code in document_ready block.

  var modal_lv = 10000;  
     $('.modal').on('shown.bs.modal', function (e) {  
       $('.modal-backdrop:last').css('zIndex', 1051 + modal_lv);  
       $(e.currentTarget).css('zIndex', 1052 + modal_lv);  
       modal_lv++  
     });  
     $('.modal').on('hidden.bs.modal', function (e) {  
       modal_lv--  
     });  

Sample