Blogger - disable right click menu option

Blogger - Disabling right click context menu

//disable right click menu
<script language=javascript>
	function blockOne() { 
		if (document.all) {				
				return false;
			}
			}
	function blockTwo(e) {
		if (document.layers||(document.getElementById&&!document.all)) 
		{
		if (e.which==2||e.which==3) {			
			return false;
		}
		}
		}
	if (document.layers){
		document.captureEvents(Event.mousedown);
		document.onmousedown=blockTwo;
	}
	else {
		document.onmouseup=blockTwo;
		document.oncontextmenu=blockOne;
	}
		document.oncontextmenu=new Function("return false");
</script>