Disable Mouse Right click over the .aspx page

//jscript.js file

var BM = 2; // button middle
var BR = 3; // button right


function mouseDown(e)
{
try { if (event.button==BM||event.button==BR) {return false;} }
catch (e) { if (e.which == BR) {return false;} }
}
document.oncontextmenu = function() { return false; }
document.onmousedown = mouseDown;

//page source code(Add .js file in page automatically handle the right click)
script src="JScript.js" type="text/javascript" language="javascript" />