复制代码 代码如下:

<scriptlanguage="Javascript">

//屏蔽鼠标右键、Ctrl+N、Shift+F10、F5刷新、退格键

//屏蔽F1帮助

functionwindow.onhelp()

{

returnfalse

}

functionKeyDown()

{

//alert(event.keyCode);

//屏蔽Alt+方向键←屏蔽Alt+方向键→

if((window.event.altKey)&&((window.event.keyCode==37)||(window.event.keyCode==39)))

{

//alert("不准你使用ALT+方向键前进或后退网页！");

event.returnValue=false;

}

//屏蔽退格删除键,屏蔽F5刷新键,Ctrl+R

if((event.keyCode==116)||(event.ctrlKey&&event.keyCode==82))

{

event.keyCode=0;

event.returnValue=false;

}

//屏蔽Ctrl+n

if((event.ctrlKey)&&(event.keyCode==78))

{

event.returnValue=false;

}

//屏蔽shift+F10

if((event.shiftKey)&&(event.keyCode==121))

{

event.returnValue=false;

}

//屏蔽shift加鼠标左键新开一网页

if(window.event.srcElement.tagName=="A"&&window.event.shiftKey)

{

window.event.returnValue=false;

}

//屏蔽Alt+F4

if((window.event.altKey)&&(window.event.keyCode==115))

{

window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");

returnfalse;

}

//屏蔽Ctrl+A

if((event.ctrlKey)&&(event.keyCode==65))

{

returnfalse;

}

}

</script>