function x() {
if (event.button==2||event.button==3) {
oncontextmenu='return false'
onselectstart='return false'
ondragstart='return false'}}
document.onmousedown=x
document.oncontextmenu=new Function('return false')
document.onselectstart=new Function('return false')
document.ondragstart=new Function('return false')