<script type="text/javascript">    
document.ondragstart = test;    
document.onselectstart = test;    
document.oncontextmenu = test;    
    function test() {    
return false;    
}    
document.oncontextmenu;    
    function catchControlKeys(event){    
var code=event.keyCode ? event.keyCode : event.which ? event.which : null;    
if (event.ctrlKey){    
// Ctrl+U    
if (code == 117) return false;    
if (code == 85) return false;    
// Ctrl+C    
if (code == 99) return false;    
if (code == 67) return false;    
// Ctrl+A    
if (code == 97) return false;    
if (code == 65) return false;    
}    
}    
</script>