// Display error messages when page loads.
	var messageText = "";
    var childwindow;
    var childwindow2;
	var agt = navigator.userAgent.toLowerCase();
	var ieAgent = agt.indexOf('msie');


	function displayPicture(target) {
		var pic = document.getElementById('pic');
		pic.src = 'images/' + target + '.jpg';
	}	



	function disableRightClick(e) {
		if (ieAgent != -1) { 
			if (event.button==2){
				alert("Right click is disabled !!!");
			}
		} else {
			if (e.button==2||e.button==3)
			{
			  	e.preventDefault();
			  	e.stopPropagation();
				alert("Copy right !");
			  	return false;
			} else {
				return true;
			}
		}
	}	
	
	if (ieAgent!= -1) { 
		document.onmousedown= disableRightClick
	} else {
		document.onclick=disableRightClick;
	}