How to set Short Cut key in Asp.net Application Using Java Script

//This line is very Importance

 

document.onkeydown = checkKeycode

function checkKeycode(e)

{

var keycode;

if (window.event)

keycode = window.event.keyCode;

else

    if (e.which == 113) // for F2 Key of Key board

    //keycode = e.which;

    //alert("keycode: " + keycode);

    document.getElementById("ImgBtnRoute").click();

}