<script language="Javascript" type="text/javascript">
//屏蔽鼠標(biāo)右鍵、Ctrl+N、Shift+F10、F11、F5刷新、退格鍵
function document.oncontextmenu() {
event.returnValue = false;
} //屏蔽鼠標(biāo)右鍵
function window.onhelp() {
return false
} //屏蔽F1幫助
function document.onkeydown() {
if ((window.event.altKey) && ((window.event.keyCode == 37) || //屏蔽 Alt+ 方向鍵 ←
(window.event.keyCode == 39))) //屏蔽 Alt+ 方向鍵 →
{
alert("不準(zhǔn)你使用ALT+方向鍵前進(jìn)或后退網(wǎng)頁(yè)！");
event.returnValue = false;
}
/* 注：這還不是真正地屏蔽 Alt+ 方向鍵，
因?yàn)?Alt+ 方向鍵彈出警告框時(shí)，按住 Alt 鍵不放，
用鼠標(biāo)點(diǎn)掉警告框，這種屏蔽方法就失效了。以后若
有哪位高手有真正屏蔽 Alt 鍵的方法，請(qǐng)告知。*/

if ((event.keyCode == 8) || //屏蔽退格刪除鍵
(event.keyCode == 116) || //屏蔽 F5 刷新鍵
(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 加鼠標(biāo)左鍵新開(kāi)一網(wǎng)頁(yè)
if ((window.event.altKey) && (window.event.keyCode == 115)) //屏蔽Alt+F4
{
window.showModelessDialog("about:blank", "", "dialogWidth:1px;dialogheight:1px");
return false;
}
}
</script>