a标签 href触发及传值

var d=document.getElementById("exportA");
alert(d.href);
d.href="${ctx}/templet/tEdasTempletInfo/export&titleCode='"+titleCode+"'&titleName='"+titleName+"'&notNull='"+notNull+"'&isMetadate='"+isMetadate+"'";
alert(d.href);
d.click();