jquery禁用右键、文本选择功能、复制按键的实现

//禁用右键、文本选择功能、复制按键
$(document).bind(“contextmenu”,function(){return false;});
$(document).bind(“selectstart”,function(){return false;});
$(document).keydown(function(){return key(arguments[0])});

//按键时提示警告
function key(e){
var keynum;
if(window.event){
keynum = e.keyCode; // IE
}else if(e.which){
keynum = e.which; // Netscape/Firefox/Opera
}
if(keynum == 17){
alert(“禁止复制内容！”);
return false;
}
}

//按键时提示警告
function key(e){
var keynum;
if(window.event) // IE
{
keynum = e.keyCode;
}
else if(e.which) // Netscape/Firefox/Opera
{
keynum = e.which;
}
if(keynum == 17){ alert("禁止复制内容！");return false;}
}

<script>
//屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键
function   document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键
function   window.onhelp(){return false}       //屏蔽F1帮助
function   document.onkeydown(){
if((window.event.altKey)&&
((window.event.keyCode==37)||            //屏蔽Alt+方向键←
(window.event.keyCode==39))){            //屏蔽Alt+方向键→
alert("不准你使用ALT+方向键前进或后退网页！");
event.returnValue=false;
}         if((event.keyCode==8)||                    //屏蔽退格删除键
(event.keyCode==116)||                   //屏蔽F5刷新键
(event.ctrlKey && event.keyCode==82)){   //Ctrl+R
event.keyCode=0;
event.returnValue=false;
}
if(event.keyCode==122){event.keyCode=0;event.returnValue=false;}    //屏蔽F11
if(event.ctrlKey && event.keyCode==78)event.returnValue=false;      //屏蔽Ctrl+n
if(event.shiftKey && event.keyCode==121)event.returnValue=false;    //屏蔽shift+F10
if(window.event.srcElement.tagName=="A" && window.event.shiftKey)
window.event.returnValue=false;       //屏蔽shift加鼠标左键新开一网页
if((window.event.altKey)&&(window.event.keyCode==115)){             //屏蔽Alt+F4
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
return false;
}
}
</script>