function nrcIE(){
        if (document.all){return false;}}
        function nrcNS(e){
        if(document.layers||(document.getElementById&&!document.all)){ 
        if (e.which==2||e.which==3){
        return false;}}} 
        if (document.layers){
        document.captureEvents(Event.MOUSEDOWN);
        document.onmousedown=nrcNS;
        }else{document.onmouseup=nrcNS;document.oncontextmenu=nrcIE;}
        document.oncontextmenu=new Function("return false");