解决报表HTML预览页面在IE11以及IE10，IE9下预览时兼容性问题

ureport2-js/src/dialog/PDFPrintDialog.js

@@ -215,7 +215,9 @@ export default class PDFPrintDialog{
         this.iFrame=$(`<iframe name="_iframe_for_pdf_print" style="width: 100%;height:${h}px;margin-top: 5px;border:solid 1px #c2c2c2" frameborder="0" src="${url}"></iframe>`);
         this.body.append(this.iFrame);
         const iframe=this.iFrame.get(0);
-        if(!iframe.attachEvent){
+        const msie = window.navigator.appName.indexOf("Internet Explorer");
+        const ie11=!!window.MSInputMethodContext && !!document.documentMode;
+        if(msie===-1 && !ie11){
             showLoading();
         }
         this.iFrame.on('load',function(){

ureport2-js/src/preview.js

@@ -109,13 +109,14 @@ window.buildLocationSearchParameters=function(exclude){
     }
     let parameters={};
     const pairs=urlParameters.split('&');
-    for(let item of pairs){
+    for(let i=0;i<pairs.length;i++){
+        const item=pairs[i];
         if(item===''){
             continue;
         }
         const param=item.split('=');
         let key=param[0];
-        if(key===exclude){
+        if(exclude && key===exclude){
             continue;
         }
         let value=param[1];