function document.oncontextmenu()
{
return false;
}
function cancelLink()
{
if (event.srcElement.tagName == "A" && event.shiftKey)
event.returnValue = false;
}
document.onkeydown = function()
{
//屏蔽 F5 刷新键
var k = event.keyCode;
if (k == 116)
{
event.keyCode = 0;
event.returnValue= false;
}
//屏蔽 Alt+ 方向键 ← 屏蔽 Alt+ 方向键 →
if ((event.altKey)&&((event.keyCode==37)||(event.keyCode==39)))
{
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Alt+F4
if ((event.altKey)&&(event.keyCode==115))
{
showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
return false;
}
//屏蔽Ctrl+A
if((event.ctrlKey)&&(event.keyCode==65))
{
return false;
}
}