document.oncontextmenu=new Function("return false");

    document.onmouseover = function ( e ) {   
    if ( !e ) e = window.event;   
    var el = e.target ? e.target : e.srcElement;   
    while ( el != null && el.tagName != "A" ) el = el.parentNode;   
    if ( el == null ) return;   
    if ( e.preventDefault ) e.preventDefault();   
    else e.returnValue = true;};