$("#input_form_container").loadActionTemplate()
                          .find ('.form-focus:first').focus();

<input class="span1 form-focus" id="min-duration" name="min-duration" size="16" type="text">

$.fn.extend({
    // loadActionTemplate plugin
    loadActionTemplate: function(options) {
        //default settings
        var defaults = {
            actionDOM : '#do_something_dropdown',
            cache : true
        }
        // store the "this" state for safe keeping
        var domElements = $(this);
        // merge user options into default
        var options = $.extend(defaults, options);
        // assign the "action" to an easily addressible variable
        var action = $(options.actionDOM).val();
        // get the HTML form template for this action
        LG_ServiceCall ( 'get-action-template' , {'action' : action} , function( r ) {
            var res = JSON.parse ( r );
            var template = res.results.template;
            // iterate through all matched DOM instances
            return domElements.each(function() {
                // get handle on DOM object operating on
                var element = $(this);
                element.html( template );
                element.find('.form-focus:first').focus();
            })
        });
        return domElements; // allows the function to operate in a chain
    }
});

function LG_ServiceCall( $service , $options , $callback );

requestObj.success = function (r) {
    console.log ("Successful AJAX Call ( " + JSON.stringify (r) + ")");
    callback (r);
}