The javascript code run two times on IE11

function addTab(title, url, iconCls) {

            iconCls = iconCls || 'icon-home';

            if ($('#tabs').tabs('exists', title)) {
                $('#tabs').tabs('select', title);
            } else {
                $('#tabs').tabs('add', {
                    title: title,
                    content: createFrame(url),
                    closable: true,
                    iconCls: iconCls
                });
            }

        }

   
        function createFrame(url) {
            var s = '<iframe scrolling="auto" frameborder="0"  src="' + url + '" style="width:100%;height:99.5%;"></iframe>';
            return s;
        }

Tabs use of content when loading html or js js will perform two times.

换了1.4版本后，tab里面放了iframe以后，会加载两次，请问如何解决呢？

is there a way to resolve it?

why datagrid receive data with html instead of json on IE
Chrome is right.

When the width of brower greater than the datagrid ,hide the horizontal  scrolling of datagrid.
When the width of browser less then the datagrid ,show the horizontal scrolling.
Is there any way to do?

Is there queryParams on tree like DataGrid?

how to apply placeholder function in IE8 use combobox,validatebox and so on

How to hide the comboBox required ICON at the first time?

Is there a way to press the enter key to close the Messager