nell'head:

<script language="JavaScript1.2">

//Disable select-text script (IE4+, NS6)
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
}
</SCRIPT>


Ciao