</select>
<select name="subselM_1" MULTIPLE size="5" onChange="driverselect(this,'subsubselM_1',subsubopt)">
<option selected value="all">==查看所有==</option>
</select>
<select name="subsubselM_1" MULTIPLE size="5">
<option selected value="all">==查看所有==</option>
</select>
<br><br>
sample4:
<select name="selM_2" MULTIPLE size="5" onChange="driverselect(this,'subselM_2',subopt)">
<option selected value="">==查看所有==</option>
</select>
<select name="subselM_2" MULTIPLE size="5" onChange="driverselect(this,'subsubselM_2',subsubopt)">
<option selected value="">==查看所有==</option>
</select>
<select name="subsubselM_2" MULTIPLE size="5">
<option selected value="">==查看所有==</option>
</select>
<br><br>
</form>
<SCRIPT LANGUAGE="JavaScript">
<!--
//初始化sample1:第一个下拉菜单项
fillselect('sel_1',opt,'');
//初始化sample2:第一个下拉菜单项
fillselect('sel_2',opt,'');
//初始化sample3:第一个下拉菜单项
fillselect('selM_1',opt,'');
//初始化sample4:第一个下拉菜单项
fillselect('selM_2',opt,'');
//-->
</SCRIPT>
</body>
</html>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
