javascript 禁用F5等功能鍵

來源:互聯網
上載者:User
function window.onhelp()//屏蔽F1協助
{
    return false;
}
 
function document.onkeydown()
{
    if
            ((window.event.altKey && window.event.keyCode == 37) //屏蔽 Alt+ 方向鍵 ←
            || (window.event.altKey && window.event.keyCode == 39)//屏蔽 Alt+ 方向鍵 →
            || (window.event.ctrlKey && window.event.keyCode == 78)//CtrlN
            || (window.event.ctrlKey && window.event.keyCode == 82)//CtrlR
            || (window.event.keyCode == 116)//屏蔽 F5 
            )
    {
        window.event.keyCode = 0;
        window.event.returnvalue = false;
        return false;
    }
}
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