getElementbyId 的问题
我在 getElementbyId 方面遇到问题，如下所示：
<script type="text/javascript">
<!--
function show_links(locale) {
var box = document.getElementById(locale);
if(box.style.display == "none") {
box.style.display = "inline";
}
else {
box.style.display = "none";
}
}
//-->
</script>
<div class="link"><strong><a href="javascript:show_links(test);">Test</a></strong></div>
<div class="test"> Blah blah blah. This content comes and goes. </div>
所以您有代码。当我单击链接“测试”时，它应该隐藏“等等等等文本”。再次单击时，它应该显示。但是，我有一个奇怪的问题。我通过调试器处理了代码，似乎行 var box = document.getElementById(locale); 无法正常工作。 box 被设置为 null。任何人都可以推理为什么吗？
I'm having a problem with getElementbyId as follows:
<script type="text/javascript">
<!--
function show_links(locale) {
var box = document.getElementById(locale);
if(box.style.display == "none") {
box.style.display = "inline";
}
else {
box.style.display = "none";
}
}
//-->
</script>
<div class="link"><strong><a href="javascript:show_links(test);">Test</a></strong></div>
<div class="test"> Blah blah blah. This content comes and goes. </div>
So there you have the code. When I click the link "Test", it should hide the "blah blah blah text". When clicked again, it should show. However, I have an odd problem. I processed the code through a debugger, and it seems that the line var box = document.getElementById(locale); is not working correctly. box is being set to null. Can anyone theorize why?
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你有几个问题。首先是关键的：
show_links函数的值是变量test。这等于undefined因此它不会匹配任何内容。您需要为尝试匹配的元素提供 id 并传递字符串而不是未定义的值。
然后是较小的问题。
className属性，并在样式表中定义样式。inline和none之间摆弄 div，但 div 的默认显示值为block。有理由将 div 样式设置为内联，但大多数时候您应该使用另一个元素。You have several problems. First the critical ones:
show_linksfunction is the variabletest. This is equal toundefinedso it isn't going to match anything.You need to give the element you are trying to match an id and pass a string instead of an undefined value.
Then the lesser issues.
classNameproperty, and have your styles defined in a stylesheet.inlineandnone, but the default display value for a div isblock. There are reasons to have a div styled inline, but most of the time you should be using another element.test是一个未知标识符。你在哪里定义的？你的意思是喂一根绳子吗？此行中没有 id 为
test的元素。使用正确的属性id。testis an unknown identifer. Where did you define it? Did you mean to feed a string?There is no element with an id of
testin this line. Use the proper attributeid.