取消复选框的被选中状态，同时该复选框也删除
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script>
function clearbox(v)
{
document.body.removeChild(v);
}
function addCheckbox(v)
{
if(v!="0")
{
var str="<input title="+v+" type=checkbox checked onclick=clearbox(this) value="+v+">";
var newCheckbox = document.createElement(str);
document.body.insertBefore(newCheckbox);
document.all("select").value="0";
}
}
</script>
</HEAD>
<BODY>
<select name="select" onclick="addCheckbox(this.value)">
<option value='0'>请选择</option>
<option value='值1'>选项1</option>
<option value='值2'>选项2</option>
<option value='值3'>选项3</option>
<option value='值4'>选项4</option>
<option value='值5'>选项5</option>
<option value='值6'>选项6</option>
</select>
</BODY>
</HTML>
