Code
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<script type="text/javascript">
function toggle(sDivId)
{
var oDiv = document.getElementById(sDivId);
//当display设置为none时，元素就被从页面流中移除，页面重绘时就像这个元素不存在一样
oDiv.style.display = (oDiv.style.display == "none") ? "block" : "none";
//将visiblility设置为hidden时，它仅仅隐藏元素，以留下一个元素所占区域的空白
//oDiv.style.visibility = (oDiv.style.visibility == "visible") ? "hidden" : "visible";
}
</script>
</head>
<body>
<div id="a" style="background-color: blue; color: while;font-weight: bold; padding: 2px; cursor: pointer"
onclick="toggle('divContent1')">Click Here</div>
<div style="border: 3px solid gray; height: 100px; padding: 10px"
id="divcontent1">This is some content to show and hide.</div>
<div id="b" style="background-color: red; color: black; font-weight: bold;padding:10px; cursor: pointer"
onclick="toggle('divContent2')">Click Here</div>
<div style="border: 3px solid green; height:100px;padding:10px"
id="divContent2">This is some content to show and hide.</div>
</body>
</html>
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