怎么用代码激活 onchange 提示？

  <select name="test" onchange="alert('有提示')">
  <option value="00001">test1</option>
  <option value="00002">test2</option>
  <option value="00003">test3</option>
  </select>
  <button onclick="test.value='00002';">测试有没有提示</button>   选择下拉菜单，可以有提示。
点击按钮后定位到某项后，如何也出现提示？
必须支持 FF 、IE

解决方案 »

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select1.fireEvent("onchange");   FF下支持吗
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$("#buttonTest").click(function() {
$("select[name=test]").val("00002").change();
});
});
</script>
</head>
<body>
<select name="test" onchange="alert('有提示')">
<option value="00001">test1 </option>
<option value="00002">test2 </option>
<option value="00003">test3 </option>
</select>
<button id="buttonTest">测试有没有提示 </button>
</body>
</html>
不明白你说的意思  <select name="test" onchange="alert('有提示')">
  <option value="00001">test1 </option>
  <option value="00002">test2 </option>
  <option value="00003">test3 </option>
  </select>   <button onclick="test.value='00002';" value="测试有没有提示 " /> 点了之后 button 的按钮显示就变成了 00002 了
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script src="../jquery-1.3.2.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
$("select[name=test]").change(function(){

alert($(this)[0].value);
});
$("input[type=button]").click(function(){

alert($("select[name=test]")[0].value);
});
});
</script>
</head><body>
<select name="test">
  <option value="00001">test1 </option>
  <option value="00002">test2 </option>
  <option value="00003">test3 </option>
  </select>
  <input type="button" value="测试有没有提示" /></body>
</html>
可能想要这种效果.IE6.IE7.FF测试通过..
哎。那我还是帮你写一下吧。。<select name="test" onchange="fun(this.value)" id="sel">
  <option value="00001">test1 </option>
  <option value="00002">test2 </option>
  <option value="00003">test3 </option>
</select>
<input onclick="fun(00001);" value="测试有没有提示" type="button" /><script type="text/javascript">
var fun = function(v){
    for(var i=0;i<document.getElementById('sel').length;i++){
       var s = document.getElementById('sel').options[i] ;
       if(s.value == v){
alert('you got it');
s.selected = true ;
break ;
}
}
}</script>
<html>
<head>
<script type="text/javascript">
function favBrowser()
{
var mylist=document.getElementById("myList")
document.getElementById("favorite").value=mylist.options[mylist.selectedIndex].text
}
</script>
</head><body>
<form>
请选择您喜欢的水果：
<select id="myList" onchange="favBrowser()">
  <option>苹果</option>
  <option>水蜜桃</option>
  <option>香蕉</option>
</select>
<p>您喜欢的水果是：<input type="text" id="favorite" size="20"></p>
</form>
</body></html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <script type="text/javascript">
function buttonTest() {
var select = document.getElementsByName("test")[0];
select.value = "00002";
select.onchange();
}
    </script>
</head>
<body>
    <select name="test" onchange="alert('有提示')">
        <option value="00001">test1 </option>
        <option value="00002">test2 </option>
        <option value="00003">test3 </option>
    </select>
    <button id="buttonTest" onclick="buttonTest();">测试有没有提示 </button>
</body>
</html>
<HTML>
<HEAD>
<script language="javascript">
function test(){
alert("提示");
}
function setSelValue(value){
var sel_flag = document.getElementById("selTest");
if(sel_flag.value != value){
sel_flag.value = value;
sel_flag.onchange();
}
}
</script>
</HEAD><BODY>
<select id="selTest" onchange="test()">
<option value="00001">00001</option>
<option value="00002">00002</option>
<option value="00003">00003</option>
</select>
<input type="button" value="测试" onclick="setSelValue('00002')" />
</BODY>
</HTML>