google 二位码API

按照当前页的url，生成二维码扫图

<style type="text/css"> 
.eweima{ 
200px; 
height:200px; 
margin:auto; 

} 
</style> 
<div class="eweima"> 
<script type="text/javascript"> 
document.write("<img src="https://chart.googleapis.com/chart?cht=qr&chs=500x500&choe=UTF-8&chld=L|2&chl="); title="" 
document.write(window.location.href); 
document.write("" width="200" height="200" alt="二维码"/>"); 
</script>	
</div>