<form name="frm1">
<select name ="test">
<option value="1" selected> test1</option>
<option value="2"> test2</option>
<option value="3"> test3</option>
</select>
</form>
<script language="javascript">
function setSelected(){
var frm = document.frm1;
for(var i=0;i<frm.test.length;i++){
if(frm.test.options(i).value=="2"){
frm.test.options(i).selected=true;
}
}
}
setSelected();
</script>
<select name ="test">
<option value="1" selected> test1</option>
<option value="2"> test2</option>
<option value="3"> test3</option>
</select>
</form>
<script language="javascript">
function setSelected(){
var frm = document.frm1;
for(var i=0;i<frm.test.length;i++){
if(frm.test.options(i).value=="2"){
frm.test.options(i).selected=true;
}
}
}
setSelected();
</script>
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<Script Language="JavaScript">
function choose(i) {
if(!isNaN(i))
form1.select1.options[i-1].selected = true;
}
</Script>
</HEAD><BODY>
<form name="form1">
<select name="select1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
<br>
选择(1-4)<input type="text" name="txt1" size="1" maxlength="1"><br>
<input type="button" name="btn1" value="choose" onClick="javascript:choose(form1.txt1.value)">
</form>
</BODY>
</HTML>