The alert is showing, but the value is not changing.... why?
<html>
<head>
开发者_StackOverflow中文版 <title>Test EuDock</title>
</head>
<body >
<label id="labelID">test</label>
<script type="text/javascript" >
document.onkeyup = KeyCheck;
function KeyCheck(e) {
var KeyID = (window.event) ? event.keyCode : e.keyCode;
switch(KeyID)
{
case 39: // right arrow
document.getElementById('labelID').value="BLZ";
alert('ok');
break;
}
}
</script>
</body>
</html>
Only input elements have the property value. You want innerHTML :
document.getElementById('labelID').innerHTML="BLZ";
innerHTML is the only attribute that is supported by all browsers.
innerText is not supported by Firefox and textContent is not supported by <= IE8.
I don't think value is a property defined in the DOM for HTML elements. Try assigning to .innerHTML instead, and I think you'll get the result you want.
Try this instead:
document.getElementById('labelID').innerText ="BLZ";
The label element does not have a value property. use document.getElementById('labelID').innerHTML="BLZ"; instead.
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
加载中,请稍侯......
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