css+div的一个布局 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>text</title>
<style>
#globalNav {
FONT-SIZE: 12px; WIDTH: 750px;TEXT-ALIGN: left;background-color: #FFF;
}
#main_left {
FLOAT: left; width:490; MARGIN: 0px 0px 0px 0px; PADDING:10px 10px 10px 10px; background-color: #FFF; BORDER: #000 1px solid;
}
#main_center {
FLOAT: left;width:50; MARGIN: 0px 0px 0px 0px; PADDING:10px 10px 10px 10px; background-color: #0FF;BORDER: #E00 1px solid;
}
#main_right {
FLOAT: right; width:200; MARGIN: 0px 0px 0px 0px; PADDING:10px 10px 10px 10px; background-color: #66CC00; BORDER: #009900 1px solid;
}
</style>
</head>
<body>
<div id="globalnav">
<!--主内容左栏开始-->
<div id="main_left">left
</div>
<!--主内容中栏开始-->
<div id="main_center">center
</div>
<!--主内容右栏开始-->
<div id="main_right">right
</div>
</div>
</body>
</html>
IT过五一，昨天晚上又通宵达旦
一个很好看的select代码，用css定义
