<SELECT id="s1" size="10">
<OPTION>1</OPTION>
<OPTION>2</OPTION>
<OPTION>3</OPTION>
<OPTION>4</OPTION>
</SELECT>
<INPUT type="button" value="删除" onclick =" document.form1.s1.remove(s1.selectedIndex);">
<OPTION>1</OPTION>
<OPTION>2</OPTION>
<OPTION>3</OPTION>
<OPTION>4</OPTION>
</SELECT>
<INPUT type="button" value="删除" onclick =" document.form1.s1.remove(s1.selectedIndex);">
<SELECT id="Com_Regkind" size="10">
</SELECT>
<INPUT type="button" value="删除第2个" onclick =" document.myform.Com_Regkind.remove(1);">
<script>
window.document.myform.Com_Regkind.options[0]=new Option('独资','独资');
window.document.myform.Com_Regkind.options[1]=new Option('民营','民营');
window.document.myform.Com_Regkind.options[2]=new Option('国营','国营');
window.document.myform.Com_Regkind.options[3]=new Option('其它','其它');
</script>
</form>