How do I compare 2 reference values in Client Script?

Hello guys,

I am trying to compare the values "Opened By" and "Resolved By" via a Client Script. I've tried both of the below code snippets, however they don't seem to work as expected. 

var openby = g_form.getReference('opened_by');
var resolveby = g_form.getReference('resolved_by');

if(resolveby == openby)
{
        g_form.setReadonly('u_firstcallresolution',true);
	g_form.setValue('u_firstcallresolution',true);
}

var openby = g_form.getValue('opened_by');
var resolveby = g_form.getValue('resolved_by');

if(resolveby == openby)
{
        g_form.setReadonly('u_firstcallresolution',true);
	g_form.setValue('u_firstcallresolution',true);
}

Please help!!