var msgNorightclick='Sorry, right-click is not available'

function noRightClick(e) {
    if(e==null || e==undefined){
	e=window.event
    }
    if(e.button)
	mousebutton=e.button
    else
	mousebutton=e.which
    if (mousebutton==2 || mousebutton==3 || mousebutton==4) {
    	alert(msgNorightclick)
	return false
    }
}

//document.onmousedown=noRightClick
if(document.layers){
    window.captureEvents(Event.MOUSEDOWN || Event.CLICK)
}
//window.onclick=noRightClick
//window.onmousedown=noRightClick