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
}
//No Internet Explorer 4.0 ou superior
document.onselectstart=new Function ("return false")
//No Netscape
if (window.sidebar)
{
document.onmousedown=disableselect
document.onclick=reEnable}