jQuery禁用键盘后退屏蔽F5刷新及禁用右键单击

$(document).ready(function(){  $(document).bind("keydown",function(e){   var e=window.event||e;   if(e.keyCode==116){    e.keyCode = 0;    return false;   }  }) })

$(document).keydown(function(event){        //屏蔽 Alt+ 方向键 ←      //屏蔽 Alt+ 方向键 →     if ((event.altKey)&&((event.keyCode==37)||(event.keyCode==39)))       {         event.returnValue=false;         return false;     }      //屏蔽退格删除键      if(event.keyCode==8){        return false;      }             //屏蔽F5刷新键      if(event.keyCode==116){        return false;      }     //屏蔽alt+R     if((event.ctrlKey) && (event.keyCode==82)){       return false;     } });

$(document).ready(function() { $(document).bind("contextmenu",function(e) { alert("sorry! No right-clicking!"); return false; }); }); 

$(document).keydown(function (e) { var doPrevent; if (e.keyCode == 8) { var d = e.srcElement || e.target; if (d.tagName.toUpperCase() == 'INPUT' || d.tagName.toUpperCase() == 'TEXTAREA') { doPrevent = d.readOnly || d.disabled; } else doPrevent = true; } else doPrevent = false; if (doPrevent) e.preventDefault(); });