css样式让input垂直居中

css样式让input垂直居中

css代码：

.div1{
border: 1px solid #CCC;
width:1120px;
height:40px;
margin:auto;
display: table;
*position: relative;
overflow: hidden;
}
.div2 {
vertical-align: middle;
display: table-cell;
*position: absolute;
*top: 50%;
}
.div3 {
*position: relative;
*top: -50%;
float:right;
padding-right:10px;
}

html代码：

<div class="div1">
    <div class="div2">
        <div class="div3">
            <input type="text" size="30">
        </div>
    </div>
</div>