<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script>
function ini(){
B.style.display="block"
C.style.display="none"
}
function chg(obj){
if(obj.selectedIndex==1){
B.style.display="block"
C.style.display="none"
}
else{
B.style.display="none"
C.style.display="block"
}
}
</script>
</head><body onload="ini()">
<input id="C" />
<select id="A" onchange="chg(this)">
<option>A的0</option>
<option>A的1</option>
<option>A的2</option>
<option>A的3</option>
<option>A的4</option>
<option>A的5</option>
<option>A的6</option>
</select>
<select id="B">
<option>B的0</option>
<option>B的1</option>
</select>
</body>
</html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script>
function ini(){
B.style.display="block"
C.style.display="none"
}
function chg(obj){
if(obj.selectedIndex==1){
B.style.display="block"
C.style.display="none"
}
else{
B.style.display="none"
C.style.display="block"
}
}
</script>
</head><body onload="ini()">
<input id="C" />
<select id="A" onchange="chg(this)">
<option>A的0</option>
<option>A的1</option>
<option>A的2</option>
<option>A的3</option>
<option>A的4</option>
<option>A的5</option>
<option>A的6</option>
</select>
<select id="B">
<option>B的0</option>
<option>B的1</option>
</select>
</body>
</html>
<option>索引值 零</option>
<option>索引值 壹</option>
</select><select id="B">
</select><input type="text" id="C"><script type="text/javascript">
//<![CDATA[
var A = document.getElementById("A");
var B = document.getElementById("B");
var C = document.getElementById("C");
C.style.display = "none";
A.onchange =
function()
{
switch(this.selectedIndex)
{
case 1:
C.style.display = "none";
B.style.display = "inline";
break;
default:
C.style.display = "inline";
B.style.display = "none";
break;
}
}
//]]>
</script>
<option>索引值 零</option>
<option>索引值 壹</option>
</select><select id="B">
</select><input type="text" id="C">
<script type="text/javascript">
<!--
var ge = function(id){return document.getElementById(id);};
var setDisplay=function(arobj,arstyle){for(var i=0,j=arobj.length;i<j;i++) arobj[i].style.display=arstyle[i];} ;
setDisplay([ge("C")],["none"]);
ge("A").onchange = function(){
var ar = ["","none"];
if(this.selectedIndex==1) ar.reverse();
setDisplay([ge("B"),ge("C")],ar);
}
//-->
</script>