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 message="Function Disabled!";
 
///////////////////////////////////
function clickIE4(){
if (event.button==2){
alert(message);
return false;
}
}
 
function clickNS4(e){
if (document.layers||document.getElementById&&!document.all){
if (e.which==2||e.which==3){
alert(message);
return false;
}
}
}
 
if (document.layers){
document.captureEvents(Event.MOUSEDOWN);
document.onmousedown=clickNS4;
}
else if (document.all&&!document.getElementById){
document.onmousedown=clickIE4;
}
 
document.oncontextmenu=new Function("alert(message);return false")
// --> 

 
 

 
// (C) 2003 CodeLifter.com
// Source: CodeLifter.com
// Do not remove this header
 
// Set the message for the alert box
am = "This function is disabled!";
 
// do not edit below this line
// ===========================
bV  = parseInt(navigator.appVersion)
bNS = navigator.appName=="Netscape"
bIE = navigator.appName=="Microsoft Internet Explorer"
 
function nrc(e) {
   if (bNS && e.which > 1){
      alert(am)
      return false
   } else if (bIE && (event.button >1)) {
     alert(am)
     return false;
   }
}
 
document.onmousedown = nrc;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
if (bNS && bV<5) window.onmousedown = nrc;
 

 

 
message = "rerte";
 
function NoRightClick() {
   if(((navigator.appName=="Microsoft Internet Explorer")&&(event.button > 1))
   ||((navigator.appName=="Netscape")&&(b.which > 1))){
   alert(message);
   return false;
   }
}
document.onmousedown = NoRightClick;
 
// -->

 
 
 
 <!--

 
var message="Sorry, This function is disabled."; // Message for the alert box
 
// Don't edit below!
 
function click(e) {
if (document.all) {
if (event.button == 2) {
alert(message);
return false;
}
}
if (document.layers) {
if (e.which == 3) {
alert(message);
return false;
}
}
}
if (document.layers) {
document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown=click;
// --> 
 
 


 
 
// Set the message for the alert box
am = "This function is disabled!";
 
// do not edit below this line
// ===========================
bV  = parseInt(navigator.appVersion)
bNS = navigator.appName=="Netscape"
bIE = navigator.appName=="Microsoft Internet Explorer"
 
function nrc(e) {
   if (bNS && e.which > 1){
      alert(am)
      return false
   } else if (bIE && (event.button >1)) {
     alert(am)
     return false;
   }
}
 
document.onmousedown = nrc;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
if (bNS && bV<5) window.onmousedown = nrc;
 

 

 
message = "rerte";
 
function NoRightClick() {
   if(((navigator.appName=="Microsoft Internet Explorer")&&(event.button > 1))
   ||((navigator.appName=="Netscape")&&(b.which > 1))){
   alert(message);
   return false;
   }
}
document.onmousedown = NoRightClick;
 
// -->

  
 
 
 <!--

 
var message="Sorry, that function is disabled."; // Message for the alert box
 
// Don't edit below!
 
function click(e) {
if (document.all) {
if (event.button == 2) {
alert(message);
return false;
}
}
if (document.layers) {
if (e.which == 3) {
alert(message);
return false;
}
}
}
if (document.layers) {
document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown=click;
// --> </script>