鼠标的样式http://www.runoob.com/try/try.php?filename=trycss_cursor
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>鼠标拖拽，鼠标样式</title>
<style>
span{
display: inline-block;
width: 300px;
height: 300px;
border: 1px solid red;
}
</style>
</head>
<body>
<span style="cursor:e-resize">e-resize</span><br>
<span style="cursor:n-resize">n-resize</span><br>
<span style="cursor:s-resize">s-resize</span><br>
<span style="cursor:w-resize">w-resize</span><br>
</body>
</html>
