JavaScript网页颜色拾色器实现

<html>
<head>
<title>颜色拾色器</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css">
<!--
.style1 {color: #FFFFFF}
-->
</style>
</head>
<body style="font:menu">
<span class="style1"></span>
<table border="0" cellspacing="1" cellpadding="3" width="350" align="center" bgcolor="#dddddd">
<tr bgcolor="#FFFFFF"> 
<td width="10%" align="center"> 
<select name="select1" onchange="selectmenu(this.value)">
<option value="1" selected>红</option>
<option value="2">绿</option>
<option value="3">蓝</option>
<option value="4">灰</option>
</select>
</td>
<td width="90%" align="center"> 
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr> 
<td align="center" style="font-size:12px">用鼠标单击下面的颜色块,将弹出颜色值</td>
</tr>
</table>
</td>
</tr>
<tr bgcolor="#FFFFFF"> 
<td width="10%" align="center"> 
  <table id="table1" border="0" cellspacing="1" cellpadding="0">

</table></td>
<td width="90%" align="center"> 
<table id="table2" border="0" cellspacing="1" cellpadding="0">

</table>
</td>
</tr>
</table>

</body>
</html>

[Ctrl+A 全选 注:引入外部Js需再刷新一下页面才能执行]