如何禁用浏览器的默认帮助功能 [英] How to disable default Help function of browsers
本文介绍了如何禁用浏览器的默认帮助功能的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想停用或覆写浏览器的预设帮助功能。
我试图在网上查看几个例子，但他们不适合我。
（以下代码在ff和chrome上工作，但不在opera和ie上工作）
< html&
< title>
< / title>
< body>
< script src =jquery-1.7.1.min.jstext =type =text / javascript>< / script>
< script language =javascripttype =text / javascript>
document.onkeydown = function（event）
{
if（window.event&& window.event.keyCode == 112）
{
event。 stopPropagation（）;
event.preventDefault（）;
event.keyCode = 0;
return false;
//document.onhelp = new Function（return false;）;
//window.onhelp = new Function（return false;）;
// helpFunction（）;
}
else if（event.which == 112）
{
helpFunction（）;
}
};
var false_function = new function（）{return false;};
shortcut.add（f1，false_function）;
var helpFunction = function（）{
alert（'help'）;
}
< / script>
< h2>测试< / h2>
< / body>
解决方案>
我找到了这里这个代码，它被列为在每个版本的工作IE和FF
< script type =text / javascript>
function avoidInvalidKeyStorkes（evtArg）{
var evt =（document.all？window.event：evtArg）;
var isIE =（document.all？true：false）;
var KEYCODE =（document.all？window.event.keyCode：evtArg.which）;
var element =（document.all？window.event.srcElement：evtArg.target）;
var msg =我们已禁用此键：+ KEYCODE;
if（KEYCODE ==112）{
if（isIE）{
document.onhelp = function（）{
return（false）;
};
window.onhelp = function（）{
return（false）;
};
}
evt.returnValue = false;
evt.keyCode = 0;
window.status = msg;
evt.preventDefault（）;
evt.stopPropagation（）;
alert（msg）;
}
window.status =Done;
}
if（window.document.addEventListener）{
window.document.addEventListener（keydown，avoidInvalidKeyStorkes，false）;
} else {
window.document.attachEvent（onkeydown，avoidInvalidKeyStorkes）;
document.captureEvents（Event.KEYDOWN）;
}
< / script>
工作 JSFiddle 。请注意，您必须在点击结果标签后对其进行测试。
I want to disable or override the default help function of browsers.
I tried to look at few examples online but they are not working for me. (the following code is working on ff and chrome but not on opera & ie)
<html>
<title>
</title>
<body>
<script src = "jquery-1.7.1.min.js" text="type="text/javascript""></script>
<script language="javascript" type="text/javascript">
document.onkeydown = function(event)
{
if(window.event && window.event.keyCode == 112)
{
event.stopPropagation();
event.preventDefault();
event.keyCode = 0;
return false;
//document.onhelp = new Function("return false;");
//window.onhelp = new Function("return false;");
//helpFunction();
}
else if(event.which == 112)
{
helpFunction();
}
};
var false_function = new function(){"return false";};
shortcut.add("f1",false_function);
var helpFunction = function() {
alert('help');
}
</script>
<h2>Test</h2>
</body>
解决方案
I've found here this code that was clamied to work in each version of IE and FF
<script type="text/javascript">
function avoidInvalidKeyStorkes(evtArg) {
var evt = (document.all ? window.event : evtArg);
var isIE = (document.all ? true : false);
var KEYCODE = (document.all ? window.event.keyCode : evtArg.which);
var element = (document.all ? window.event.srcElement : evtArg.target);
var msg = "We have disabled this key: " + KEYCODE;
if (KEYCODE == "112") {
if (isIE) {
document.onhelp = function() {
return (false);
};
window.onhelp = function() {
return (false);
};
}
evt.returnValue = false;
evt.keyCode = 0;
window.status = msg;
evt.preventDefault();
evt.stopPropagation();
alert(msg);
}
window.status = "Done";
}
if (window.document.addEventListener) {
window.document.addEventListener("keydown", avoidInvalidKeyStorkes, false);
} else {
window.document.attachEvent("onkeydown", avoidInvalidKeyStorkes);
document.captureEvents(Event.KEYDOWN);
}
</script>
Working JSFiddle. Note that you have to test it after clicking the result tab.
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