Cognos10中获取柱状图焦点

<iframe frameborder="0" id="frameChart" src="" scrolling="no" height="350" width="100%"></iframe>
<div id="loading" style="display:block; padding:100px 0 100px 0;text-align:center;color:#999999;font-size:12px;">
页面加载中...
</div>

<script type="text/javascript">
function  implementClick(aa) {
   
                  //按照换行符分组
                  var bb = aa.split("\n");
                  //获取第一个"="出现的位置
                  var cc = aa.indexOf('=')+1;
                  //获取GGSN_ID值
                  var dd = trim(aa.substr(cc,bb[0].length-cc));
                  ggsnid = dd;
                  
                  //加载Iframe
                  var iframe= document.getElementById("frameChart"); 
                  var loadding = document.getElementById("loading");
                  //指定新Ifram内容
                  iframe.src="http://localhost:9300/p2pd/servlet/dispatch?b_action=cognosViewer&ui.action=run&ui.object=%2fcontent%2ffolder%5b%40name%3d%27g00176604%27%5d%2fpackage%5b%40name%3d%27PS_TEST_RAT_RAC%27%5d%2freport%5b%40name%3d%2728-%e7%82%b9%e5%87%bb%e5%9b%be%e8%a1%a8%e8%8e%b7%e5%be%97%e5%9b%be%e7%89%87%e4%b8%8a%e7%9a%84%e4%bf%a1%e6%81%af(%e5%88%97%e8%a1%a8)%27%5d&ui.name=28-%e7%82%b9%e5%87%bb%e5%9b%be%e8%a1%a8%e8%8e%b7%e5%be%97%e5%9b%be%e7%89%87%e4%b8%8a%e7%9a%84%e4%bf%a1%e6%81%af(%e5%88%97%e8%a1%a8)&run.outputFormat=&run.prompt=false&cv.toolbar=false&cv.header=false&p_ggsnid="+ggsnid;
                   
                  loadding.style.display = 'none';
}
var ggsnid;
//去除空格
function  trim(str)   
{     
   return  str.replace(/(^\s*)|(\s*$)/g,"");     
} 
//获取扇面上的信息
function addPillarClick()
{
           alert("dd");
	// 获取所有立柱
	var areaObjs = document.getElementsByTagName('area');
	
	for(var i = 0; i < areaObjs.length; i++)
	{
	   var titleTemp = areaObjs[i].getAttribute("title");
             
	   //if ("chartElement" == areaObjs[i].getAttribute("type") && -1 == titleTemp.indexOf("%"))
           if ("chartElement" == areaObjs[i].getAttribute("type") )
	   { 
	        areaObjs[i].onclick = function(){implementClick(this.getAttribute("title"));};
              }
	}
}
addPillarClick();
</script>