keys = new Array();
keys["f112"] = 'f1';
keys["f113"] = 'f2';
keys["f114"] = 'f3';
keys["f115"] = 'f4';
//keys["f116"] = 'f5';
keys["f117"] = 'f6';
keys["f118"] = 'f7';
keys["f119"] = 'f8';
keys["f120"] = 'f9';
keys["f121"] = 'f10';
keys["f122"] = 'f11';
keys["f123"] = 'f12';
keys["f27"] = 'Escape';

document.oncontextmenu= function(){ return false; }
document.onkeydown = function(){
// Capture and remap F-key
if(window.event && keys["f"+window.event.keyCode])  {
   window.event.keyCode = 505;
}
if(window.event && window.event.keyCode == 505) {
   return false; // Must return false or the browser will execute old code
    }
    else
{
  //Suppressing Browser Short Cuts like Ctrl-N(new Page).Ctrl-B(Organize favs)

if (window.event.ctrlKey)
  {
    //Capturing Ctrl-O
    if(window.event.keyCode==79)
    {
    window.event.keyCode = 505;
    }

   // Skip check for Ctrl-C/Ctrl-V/Ctrl-X
   if((window.event.keyCode!=88)
    &&(window.event.keyCode!=67)
    &&(window.event.keyCode!=86))
    {
     //Kill the ShortCut Event
     window.event.cancelBubble = true; // assumes you want to block it
     window.event.returnValue = false;
     return false; // assumes you want to kill it
    }
  }
}
}