下拉菜单自动生成

下面为效果显示

脚本说明:
第一步：把如下代码加入<body>区域中
<script language="javascript">
// Location of this script:
// http://www.qiksearch.com/javascripts/menugen.htm

var no_options;

document.write('<table cellspacing="5" cellpadding="5" style="border:2 solid #808080" align="center"><tr><td>');
document.write('<form name="qiksearch">');
if(navigator.appName=="Microsoft Internet Explorer")
{
 document.write('<font face="verdana,arial,helvetica" size="-1" color="#000000">显示<select name="select_items" onchange="javascript:showItems(this.document.qiksearch.select_items.value)" style="font-size:8pt">');
 for(var i=1; i<=30; i++)
 {
  document.write('<option value="' + i + '">' + i + '</option>');
 }
 this.document.qiksearch.select_items.selectedIndex = 4;
 document.write('</select> 链接.<br><br>');
}

document.write('<b>下拉菜单名称:</b><br><br>');
document.write('<input type="text" value="Select" name="combo_caption" size="30" style="height:20; border:1 solid #000000">');
document.write('<br><br><b>下拉菜单内容 :</b><br><br>');
document.write('<div id="items">');
for(var i=1; i<=5; i++)
{
 document.write('Option : <input type="text" size="12" name="option' + i + '" style="height:20; border:1 solid #000000"> Link to : <input type="file" name="linkto' + i + '" size="15" style="height:20; border:1 solid #000000"><br>');
}
document.write('</div>');
document.write('<br><center><input type="button" name="qiksearch_submit" value="显示代码" onclick="display()" style="font-family:verdana,arial,helvetica; font-size:8pt; height:20; width:48%; background:#EFEFEF; border:1 solid #808080; cursor:hand"> <input type="reset" onclick="javascript:location.reload();" style="font-family:verdana,arial,helvetica; font-size:8pt; height:20; width:48%; background:#EFEFEF; border:1 solid #808080; cursor:hand"></center>');
document.write('</font></form>');

document.write('</td></tr></table>');

function showItems(n)
{
 var item_disp = "";
 for(var i=0; i<n; i++)
 {
  item_disp += 'Option : <input type="text" size="12" name="option' + (i+1) + '" style="height:20; border:1 solid #000000"> Link to : <input type="file" name="linkto' + (i+1) + '" size="15" style="height:20; border:1 solid #000000"><br>';
 }
 no_options=n;
 this.document.all.items.innerHTML = item_disp;
}

if(navigator.appName=="Microsoft Internet Explorer")
{
 no_options = this.document.qiksearch.select_items.value;
}
else
{
 no_options = 5;
}

</script>

第二步：把<body>中的内容改为：
<body bgcolor="#fef4d9" onload="this.document.qiksearch.select_items.selectedIndex = 4">