Code:
<html>
<head>
<style>
#ex {
width: 700px;
background: red;
float: left;
}
a, span {
display: block;
}
ul, li {
margin: 0;
padding: 0;
}
.ex_1 {
float: left;
background: yellow;
list-style: none;
}
.ex_2 {
float: right;
}
</style>
</head>