function clearEvents(e){
var o_temp=event.srcElement;event.returnvalue=false;
if (o_temp.tagName.toLowerCase()=='textarea') {event.returnvalue=true;return true;}
if (o_temp.type && (o_temp.type.toLowerCase()=='text' || o_temp.type.toLowerCase()=='password')) {event.returnvalue=true;return true;}
return false;
}
function clearKeys(e){
if(event.keyCode==27 || event.keyCode==112 || (event.keyCode==78 && event.ctrlKey) || (event.keyCode==37 && event.altKey) || (event.keyCode==39 && event.altKey) ) {event.returnvalue=false;return false;}
}
document.oncontextmenu=document.onselectstart=document.ondragstart=clearEvents;
document.onkeydown=clearKeys;