当填充内容后  span的位置就变了
怎么让他不变了
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>editor</title>
<style type="text/css">span{  width:22px;height:22px; border:1px solid #CCCCCC; display:inline-table; margin-right:10px;cursor: pointer;
}</style>
</head>
<body><span id='span'></span> <span></span> <span></span> <span id='span1'></span>
<input type="button" value="asdf"  onclick="add()"/>
<script>
function add(){
document.getElementById('span1').innerHTML="1123"
}
</script>
</body>
</html>