<html>
<title>通过选择项显示不同的结果</title>
<head>
<script type="text/JavaScript">
function showdiv()
{
var doc=document;
var citytext=doc.getElementById("city").value;
var div1=doc.getElementById("div1");
var div2=doc.getElementById("div2");
var div3=doc.getElementById("div3");
switch (citytext)
{
case "广州":
div1.setAttribute("style","display");
div2.setAttribute("style","display:none");
div3.setAttribute("style","display:none");
doc.getElementById("text1").value=citytext;
break;
case "南昌":
div1.setAttribute("style","display:none");
div2.setAttribute("style","display");
div3.setAttribute("style","display:none");
doc.getElementById("text2").value=citytext;
break;
case "沈阳":
div1.setAttribute("style","display:none");
div2.setAttribute("style","display:none");
div3.setAttribute("style","display");
doc.getElementById("text3").value=citytext;
break;
}
}
</script>
</head>
<body>
<select title="城市" id="city" onchange="showdiv()">
<option selected value="广州">广州</option>
<option value="南昌">南昌</option>
<option value="沈阳">沈阳</option>
</select>
<div id="div1" style="display:none" >您选择了广东的省会<input type="text" id="text1" value=""/></div>
<div id="div2" style="display:none" >您选择了江西的省会<input type="text" id="text2" value=""/></div>
<div id="div3" style="display:none" >您选择了辽宁的省会<input type="text" id="text3" value=""/></div>
</body>
</html>
