function click() {
if (event.button==2||event.button==3) {
 oncontextmenu='return false';
  }
}
document.onmousedown=click
document.oncontextmenu = new Function("return false;")



function disableselect(e){
return false
}
function reEnable(){
return true
}
document.onselectstart=new Function ("return false")
if (window.sidebar){
document.onmousedown=disableselect
document.onclick=reEnable
}