$(document).ready(function(){
	
	var contextmenu;
	
	$("img").mouseenter(function(e){
		
		function click (e) {
		if (!e)
			e = window.event;

			if ((e.type && e.type == "contextmenu") || (e.button && e.button == 2) || (e.which && e.which == 3)) 
			{
				return false;
			}
		}
		
		contextmenu = document.oncontextmenu;
		document.oncontextmenu = click;

	});
	
	$("img").mouseleave(function(e){
		document.oncontextmenu = contextmenu;
	});
});