Kendo UI Editor Duplicating - asp.net

Question

I have a kendo grid with the following command below. When I first click on the command button, it works fine and there is 1 <input>, 1 <textarea> and 1 <input>. When I close the popup window and reopen it, the <textarea> is duplicated every time.
command: [{
name: "Edit",
title: "Alert Email",
width: "180px",
click: onDataBound75
}],
Calling the following function:
function onDataBound75(e) {
e.preventDefault();
$("#txtAlert").kendoEditor({
resizable: {
content: true,
toolbar: true,
encoded: false
}
});
var window = $("#emailAlert_popup").kendoWindow({
width: "600px",
visible: false,
modal: true,
actions: [
"Maximize",
"Close"
],
});
var dataItem = this.dataItem($(e.currentTarget).closest("tr"));
var viewModelAlert75 = kendo.observable({
Alert75EmailSubject: dataItem.Alert75EmailSubject,
Alert75EmailBody: dataItem.Alert75EmailBody,
Alert75FromAddress: dataItem.Alert75FromAddress,
});
kendo.bind($("#emailAlert_popup"), viewModelAlert75);
window.data("kendoWindow").center().open();
};
And the aspx file looks like this:
<div id="emailAlert_popup" class="TT_PopupWindow">
<div class="SearchParam">
<label class="control-label" for="txtAlert75EmailSubject" style="width:200px">Email Subject</label>
<input name="txtEmailSubject" id="txtAlert75EmailSubject" class="k-textbox" style="width:430px"
data-bind="value: Alert75EmailSubject" />
</div>
<div class="SearchParam">
<label class="control-label" for="txtAlert75EmailBody" style="width:200px">Email Body</label>
<textarea id="txtAlert" rows="10" cols="30" style="height:440px" aria-label="editor" data-bind="value: Alert75EmailBody"></textarea>
</div>
<div class="SearchParam">
<label class="control-label" for="txtAlert75FromAddress" style="width:200px">From Address</label>
<input name="txtFromAddress" id="txtAlert75FromAddress" class="k-textbox" style="width:430px"
data-bind="value: Alert75FromAddress"
/>
</div>
<div class="k-edit-buttons k-state-default">
<button type="button" id="btnAlert75EmailUpdate" data-role="button" class="k-button k-button-icontext k-primary k-grid-update" role="button" aria-disabled="false" tabindex="0" style="float:right"><span class="k-icon k-i-check"></span>Update</button>
<button type="button" id="btnAlert75Cancel" data-role="button" class="k-button k-button-icontext k-grid-cancel" role="button" aria-disabled="false" tabindex="1" style="float:right"><span class="k-icon k-i-cancel"></span>Cancel</button>
</div>
</div>

Answer 1

I think that when you open the window for the second time or more, it's contents are already created so your are creating another kendoEditor over and existing one. Try this:
if (!$("#txtAlert").data("kendoEditor")) {
$("#txtAlert").kendoEditor({
resizable: {
content: true,
toolbar: true,
encoded: false
}
});
}
The above condition checks whenever the window will open, if the textarea is already an editor.