How do i call code behind function into javascript page

You must do a postback and in the delegate call you method abc().
For make a postback in javascript you can use GetPostBackEventReference.

Or use Ajax callbacks to Web Methods

Hi,

try this

function doClick(e){
               //the purpose of this function is to allow the enter key to
               //point to the correct button to click.
       var key;
        if(window.event)
             key = window.event.keyCode;     //IE
        else
             key = e.which;     //firefox

           if (key == 13)
           {
               //Get the button the user wants to have clicked
               var btn = document.getElementById("ctl00_ContentPlaceHolder1_btnSearch");
               if (btn != null)
               { //If we find the button click it
                   btn.click();
                   event.keyCode = 0
               }
           }
       }