$("#图片所在元素的id").css(“height”,“放大多少px”)
$("#图片所在元素的id").css(“width”,“放大多少px”)
}
<!doctype html public "-//w3c//dtd html 4.0 transitional//en"><html>
<head>
<title>new document </title>
<meta name="generator" content="editplus">
<meta name="author" content="">
<meta name="keywords" content="">
<meta name="description" content="">
</head>
<style>
.up{
border-left:5px solid #fff
border-right:5px solid #fff
border-bottom:5px solid #f0f
width:0
height:0
font-size:2px
}
.down{
border-left:5px solid #fff
border-right:5px solid #fff
border-top:5px solid #f0f
width:0
height:0
font-size:2px
}
.left{
border-top:5px solid #fff
border-bottom:5px solid #fff
border-right:5px solid #f0f
width:0
height:0
font-size:2px
}
.right{
border-top:5px solid #fff
border-bottom:5px solid #fff
border-left:5px solid #f0f
width:0
height:0
font-size:2px
}
b{
margin:10px
}
</style>
<body>
<b class="up"></b>
<b class="down"></b>
<b class="left"></b>
<b class="right"></b>
</body>
</html>
