function NoRightClick(evnt) {       
if (navigator.appName.toUpperCase().match(/NETSCAPE/) != null)
{       
if (evnt.which == 3)
{alert("Copyright c 2009 Loong Cheng Gallery. All Rights Reserved.");return false;
}
}else       
if (event.button==2)alert("Copyright c 2009 Loong Cheng Gallery. All Rights Reserved.");
}       
document.onmousedown = NoRightClick;