params-handle

 {
   "name": "yas-jssdk",
-  "version": "2.4.1",
+  "version": "2.4.2",
   "description": "YOHO!采集系统的前端js的开发包",
   "keywords": [
     "YOHO!",

@@ -392,11 +392,12 @@ function setUnionType() {
           if (params.length) {
             if (href.indexOf('?') === -1) {
               href += '?';
+              href += params.join('&');
             } else {
-              href += '&';
+              var hrefArray = href.split('?');
+              href = href[0] + '?' + params.join('&') + href[1];
             }
 
-            href += params.join('&');
             aDom[i].setAttribute('href', href);  
           }