禁止刷新回退的JS

[removed] //禁止刷新,回退 function onKeyDown() { if ( (event.altKey) || ((event.keyCode == 8) && (event.srcElement.type != “text” && event.srcElement.type != “textarea” && event.srcElement.type != “password”)) || ((event.ctrlKey) && ((event.keyCode == 78) || (event.keyCode == 82)) ) |