//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;
}
}
