js set the current page of Business Link to pop up the customer service window

<script type="text/javascript">

function openwindow(url,name,iWidth,iHeight)  //window.open新建居中窗口
 {  
   // url 转向网页的地址  
   // name 网页名称，可为空  
   // iWidth 弹出窗口的宽度  
   // iHeight 弹出窗口的高度  
   //window.screen.height获得屏幕的高，window.screen.width获得屏幕的宽  
   var iTop = (window.screen.height-30-iHeight)/2; //获得窗口的垂直位置;  
   var iLeft = (window.screen.width-10-iWidth)/2; //获得窗口的水平位置;  
   window.open("http://www.xxxx.com.cn/商务通唤起客服地址","_blank",'height='+iHeight+',,innerHeight='+iHeight+',width='+iWidth+',innerWidth='+iWidth+',top='+iTop+',left='+iLeft+',toolbar=no,menubar=no,scrollbars=auto,resizeable=no,location=no,status=no');  
}  
</script>
 <a onclick="openwindow()" href="javascript:void(0);"><img  src="客服.jpg" border="0"></a>