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<html>
<title>testpage</title>
<head>
<script>
function onchanged(){
var depaterment = document.getElementById('depaterment') ;
document.getElementById('txt').value=depaterment.options[depaterment.selectedIndex].text;
}
</script>
<head>
<body>
<form name="form1">
<select name="depaterment" id="depaterment" onchange="onchanged()" >
<option value="111">部门111</option>
<option value="222">部门222</option>
<option value="333">部门333</option>
<option value="444">部门444</option>
<option value="555">部门555</option>
</select>
<input type="text" name="txt" value="" id="txt"/>
<input type="button" name="btn" value="查询" onclick="onchanged()" />
</form>
</body>
</html>
<html>
<title>testpage</title>
<head>
<script>
function onchanged(){
var txt=document.form1.txt.value
//document.getElementById('depaterment').value=document.getElementById('txt').value;
document.getElementById('txt').value=document.getElementById('depaterment').value;
//alert(txt);
}
</script>
<head>
<body>
<form name="form1">
<select name="depaterment" id="depaterment" onchange="onchanged()" >
<option value="111">部门111</option>
<option value="222">部门222</option>
<option value="333">部门333</option>
<option value="444">部门444</option>
<option value="555">部门555</option>
</select>
<input type="text" name="txt" value="" id="txt"/>
<input type="button" name="btn" value="查询" onclick="onchanged()" />
</form>
</body>
</html>