document.oncontextmenu = function() { return false;}
document.ondragstart = function() { return false;}
document.onselectstart = function() { return false;}
document.onselect = function() { document.selection.empty();}
document.oncopy= function() { document.selection.empty();}
document.onbeforecopy = function() { return false;}
document.onmouseup= function() { document.selection.empty();}
window.onload= getOthNo;