checkbox,复选框垂直居中
<div style=" width:100px; height:50px; border:1px solid red; text-align:center; vertical-align:middle"><input name="" type="checkbox" value="" style=" height:50px; line-height:50px; margin:0; padding:0;" /></div>
<div style=" width:100px; height:50px; border:1px solid red; text-align:center; vertical-align:middle"><input name="" type="checkbox" value="" style=" height:50px; line-height:50px; margin:0; padding:0;" /></div>
