Jquery禁用鼠标右键，关闭键盘保存功能及F12

$('body').bind("mousedown",function(e){
     $('body').bind("contextmenu",function(e){
         return false;
     });
     if(e.which==3){
      return false;
     }
     $(document).bind("selectstart",function(){
         return false;
     });
});
//按键触发
document.onkeydown = function(){
	//禁止ctrl+s
  if ((event.ctrlKey && window.event.keyCode==83)||(event.keyCode == 123)||(event.ctrlKey && window.event.keyCode==85)){
     return false;
  }
}