function IE(e) 
{if (navigator.appName == "Microsoft Internet Explorer" && (event.button == "2" || event.button == "3"))
     {return false;}}
function NS(e) 
{if (document.layers || (document.getElementById && !document.all))
     {if (e.which == "2" || e.which == "3")
          {return false;}}}
document.onmousedown=IE;document.onmouseup=NS;document.oncontextmenu=new Function("return false");