window.oncontextmenu = alertFF;
function alertFF() {
 
  alert('(c) b17ro.info');
	return false; 
 }
 
function alertIE() {
 if (event.button == 2) 
  {
  alert('(c) b17ro.info');
  }
 }
document.onmousedown = alertIE;

function disableCtrlModifer(evt)
{
var disabled = {a:0, c:0, x:0, v:0};
var ctrlMod = (window.event)? window.event.ctrlKey : evt.ctrlKey;
var key = (window.event)? window.event.keyCode : evt.which;
key = String.fromCharCode(key).toLowerCase();
return (ctrlMod && (key in disabled))? false : true;
}

document.onmousedown = alertIE;