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function md(e)
{
try { if (event.button==2||event.button==3) return false; }
catch (e) { if (e.which == 3) return false; }
}
document.oncontextmenu = function() { return false; }
document.ondragstart = function() { return false; }
document.onmousedown = md;

</script> 
<script type="text/javascript">
if (typeof document.onselectstart!="undefined") {
document.onselectstart=new Function ("return false");
}
else{
document.onmousedown=new Function ("return false");
document.onmouseup=new Function ("return true");
}
</script>