Set session variable with select box via Ajax with Coldfusion - ajax

Question

I'm trying to set a coldfusion session variable when the value of a select box changes. However I get an error on an alert box saying "Object HTMLSelectElement" and doesnt change the session variable. Any help would be great.
Code:
Form.cfm
<cfset session.item1 = 0>
<cfselect name="item1" class="form-control" id="item1">
<option value="0">0</option>
<option value="10">10</option>
<option value="20">20</option>
<option value="30">30</option>
<option value="40">40</option>
<option value="50">50</option>
</cfselect>
Script
$('#item1').change( function() {
var item1Selected = $('#item1').val();
$.ajax({
url: '\components.cfc?method=getItem1', // You repeated "url:" in your url
data: {item1: item1Selected}, // added missing final comma
success: function(item1Selected) { alert(item1); }
});
});
Components.cfc
<cffunction name="getItem1" access="remote" returntype="any">
<cfargument name="item1" type="any" required="yes">
<cfset session.item1 = #argument.item1#>
<cfreturn />
</cffunction>

Answer 1

Change this:
<cfset session.item1 = #argument.item1#>
to this:
<cfset session.item1 = arguments.item1>
The correct scope is arguments, the plural of argument. Plus, you don't need the pound signs.
Not related to your question, but if you get your CF code to work using CF only, this sort of troubleshooting becomes a lot easier.

Answer 2

(Too long for comments)
In addition to Dan's comments about the error in the CFFunction, two other issues that may prevent the code from behaving as you expect:
Your success() function defines the response variable as item1Selected. By using alert(item1) you are actually displaying the <select> element, not the response from the ajax call.
The cffunction does not actually return anything, ie <cfreturn /> So even if you fix the variable name, the response will be undefined or blank. Returning a response is not required. However, if you did want to return some sort of data to success() you need to modify the function to return something (JSON, etcetera).