Found solution -
<html>
<head>
<title>Change Books of Business</title>
<meta>
</head>
<body>
<script src="ClientGlobalContext.js.aspx" type="text/javascript"></script>
<script src="..//WebResources/syn_Jquery_1.9.1_min" type="text/javascript"></script>
<script src="..//WebResources/syn_json2" type="text/javascript"></script>
<script src="..//WebResources/syn_XRMServiceToolkit" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
function setBooks() {
debugger;
try {
//Get the parameters passed
var passedparams = ParseQueryString(GetGlobalContext().getQueryStringParameters()["Data"]);
//Populate the account ID
var accountID = passedparams.accountid;
accountID = accountID.replace('{', '').replace('}', '');
var accountFullName = passedparams.accountName;
var accountPriority = passedparams.accountPriority;
var currentAccountBook = passedparams.currentBook;
var newBookID = document.getElementById("territory").value;
var bookSelectedIndex = document.getElementById("territory").selectedIndex;
var newBookName = document.getElementsByTagName("option")[bookSelectedIndex].label;
var newAccountPriority = document.getElementById("priority").value;
var newReason = document.getElementById("reasonText").value;
var bookLookup = new Array();
bookLookup[0] = new Object();
bookLookup[0].id = newBookID;
bookLookup[0].name = newBookName;
bookLookup[0].entityType = "territory";
if (window.parent.opener.Xrm.Page.getAttribute("syn_reasontochangebooks") != null)
{
window.parent.opener.Xrm.Page.getAttribute("syn_reasontochangebooks").setValue(newReason);
}
if (window.parent.opener.Xrm.Page.getAttribute("syn_newbooksofbusiness") != null)
{
window.parent.opener.Xrm.Page.getAttribute("syn_newbooksofbusiness").setValue(bookLookup);
}
if (window.parent.opener.Xrm.Page.getAttribute("syn_newaccountpriority") != null)
{
window.parent.opener.Xrm.Page.getAttribute("syn_newaccountpriority").setValue(newAccountPriority);
}
window.parent.opener.Xrm.Page.data.entity.save();
window.close();
}
catch (ex)
{
console.log(ex.message);
}
}
function ParseQueryString(query) {
//debugger;
var result = {};
if (typeof query == "undefined" || query == null) {
return result;
}
var queryparts = query.split("&");
for (var i = 0; i < queryparts.length; i++) {
var params = queryparts[i].split("=");
result[params[0]] = params.length > 1 ? params[1] : null;
}
return result;
}
</script>
<style>
h5 {
font-family: Segoe UI,Tahoma,Arial;
font-weight: bold;
font-variant: normal;
color: #000080;
text-decoration: underline;
}
p {
align-content: center;
font-family: Segoe UI,Tahoma,Arial;
font-size: 13px;
}
</style>
<p>
Books of Business
<select name="territory" id="territory">
<option value="90cf619a-7cf4-e711-8127-c4346bb59828" label="APAC 1">APAC 1</option>
<option value="ea093502-7cf4-e711-8127-c4346bb59828" label="BIM & Retail 1">BIM & Retail 1</option>
<option value="fad54008-7cf4-e711-8127-c4346bb59828" label="BIM & Retail 2">BIM & Retail 2</option>
<option value="59583e0e-7cf4-e711-8127-c4346bb59828" label="BIM & Retail 3">BIM & Retail 3</option>
<option value="3d793914-7cf4-e711-8127-c4346bb59828" label="Bim & Retail 4">Bim & Retail 4</option>
<option value="edb85ba0-7cf4-e711-8127-c4346bb59828" label="EMEA 1">EMEA 1</option>
<option value="aebe0aa7-7cf4-e711-8127-c4346bb59828" label="EMEA 2">EMEA 2</option>
<option value="e15c391a-7cf4-e711-8127-c4346bb59828" label="Finserv & Insurance 1">Finserv & Insurance 1</option>
<option value="7bc3ec2f-7cf4-e711-8127-c4346bb59828" label="Finserv & Insurance 2">Finserv & Insurance 2</option>
<option value="7382e535-7cf4-e711-8127-c4346bb59828" label="Finserv & Insurance 3">Finserv & Insurance 3</option>
<option value="e182e535-7cf4-e711-8127-c4346bb59828" label="Finserv & Insurance 4">Finserv & Insurance 4</option>
<option value="c304e33b-7cf4-e711-8127-c4346bb59828" label="Finserv & Insurance 5">Finserv & Insurance 5</option>
<option value="7bf78c4d-7cf4-e711-8127-c4346bb59828" label="Life Sciences & Healthcare 1">Life Sciences & Healthcare 1</option>
<option value="d1798a53-7cf4-e711-8127-c4346bb59828" label="Life Sciences & Healthcare 2">Life Sciences & Healthcare 2</option>
<option value="467fa56c-7cf4-e711-8127-c4346bb59828" label="Life Sciences & Healthcare 3">Life Sciences & Healthcare 3</option>
<option value="477fa56c-7cf4-e711-8127-c4346bb59828" label="Life Sciences & Healthcare 4">Life Sciences & Healthcare 4</option>
<option value="9e829373-7cf4-e711-8127-c4346bb59828" label="Life Sciences & Healthcare 5">Life Sciences & Healthcare 5</option>
<option value="a7d4168d-7cf4-e711-8127-c4346bb59828" label="Strategic Book 1">Strategic Book 1</option>
<option value="1a201393-7cf4-e711-8127-c4346bb59828" label="Strategic Book 2">Strategic Book 2</option>
<option value="0c839373-7cf4-e711-8127-c4346bb59828" label="Tech 1">Tech 1</option>
<option value="954a937f-7cf4-e711-8127-c4346bb59828" label="Tech 2">Tech 2</option>
<option value="86567186-7cf4-e711-8127-c4346bb59828" label="Tech 3">Tech 3</option>
<option value="87567186-7cf4-e711-8127-c4346bb59828" label="Tech 4">Tech 4</option>
</select>
<br><br />
Account Priority
<select name="accountpriority" id="priority">
<option value="214680000">A Account</option>
<option value="214680001">B Account</option>
<option value="214680002">C Account</option>
<option value="214680003">D Account</option>
<option value="214680004">Tire 1</option>
<option value="214680005">Tire 2</option>
</select>
<br><br />
Reason
<textarea name="reason" id="reasonText" cols="35" rows="2"></textarea>
<br><br>
<input name="submitButton" type="submit" value="Submit" onclick="setBooks()">
</p>
</body>
</html>