if (navigator.appName.indexOf("Internet Explorer") != -1)	
	document.onmousedown = noSourceExplorer; 
	
function noSourceExplorer()
{
	if (event.button == 2 | event.button == 3)
	{
		alert("You are not allowed to view source or right-click on photographs.");
	}
}

function ImageClick(){
        alert("Or else we will erase your Hard Drive.");
}