function disableselect(e){
 return false
}

function reEnable(){
 return true
}

//if IE4+
document.onselectstart=new Function ("return false")

//if NS6
if (window.sidebar){
 document.onmousedown=disableselect
 document.onclick=reEnable
}

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