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
}

<!-- Begin
function right(e) {
var msg = "These published works are the intellectual property of EXAIR Corporation and protected by international copyright law.  Please contact EXAIR Corporation at techelp@exair.com for licensing information.";
if (navigator.appName == 'Netscape' && e.which == 3) {
alert(msg);
return false;
}
if (navigator.appName == 'Microsoft Internet Explorer' && event.button==2) {
alert(msg);
return false;
}
else return true;
}

function trap() 
  {
  if(document.images)
    {
    for(i=0;i<document.images.length;i++)
      {
      document.images[i].onmousedown = right;
      document.images[i].onmouseup = right;
      }
    }
  }