for(var i = 0;node = from_field.options[i];i++){

	            if(node.selected){

	                //push selected fields :)

	                sel_cache.push(node);

	            }

	            else{

	                oth_cache.push(node)

	            }

	        }

	        return [sel_cache,oth_cache]

	    }

	    //fill the field with given options

	    function fill_with(field,options){

	        //clear firtst

	        field.options.length=0;

	        for(var i = 0;node = options[i];i++){

	                field.options[i]=new Option(node.text, node.value,

	                        false, false);

	        }

	    }

	    //adds to current field

	    function add_to(field,options){

	        for(var i = 0;node = options[i];i++){

	                field.appendChild(new Option(node.text, node.value,

	                        false, false));

	        }

	    }

	    // add action

	    if (this.id=='add_element'){

	        var c = get_checked(available);

	        add_to(chosen,c[0]);

	        fill_with(available,c[1]);

	    }

	    // remove action

	    if (this.id=='remove_element'){

	        var c = get_checked(chosen);

	        add_to(available,c[0]);

	        fill_with(chosen,c[1]);

	    }

	    // add all elements

	    if(this.id=='add_all_elements'){

	        for(var i=0; node = available.options[i];i++){

	                chosen.appendChild(new Option(node.text,

	                        node.value, false, false));

	        }

	        available.options.length = 0;

	    }

	    //remove all elements

	    if(this.id=='remove_all_elements'){

	        for(var i=0; node = chosen.options[i];i++){

	            available.appendChild(new Option(node.text,

	                    node.value, false, false));

	        }

	        chosen.options.length = 0;

	    }

	}

	YUE.addListener(['add_element','remove_element',

	               'add_all_elements','remove_all_elements'],'click',

	               prompts_action_callback)

	if (form_id !== undefined) {

		YUE.addListener(form_id,'submit',function(){

		    var chosen = YUD.get(selected_container);

		    for (var i = 0; i < chosen.options.length; i++) {

		        chosen.options[i].selected = 'selected';

		    }

		});

	}

}

// global hooks after DOM is loaded

YUE.onDOMReady(function(){

	YUE.on(YUQ('.diff-collapse-button'), 'click', function(e){

		var button = e.currentTarget;

		var t = YUD.get(button).getAttribute('target');

	    console.log(t);

		if(YUD.hasClass(t, 'hidden')){

			YUD.removeClass(t, 'hidden');

			YUD.get(button).innerHTML = "↑ {0} ↑".format(_TM['Collapse diff']);

		}

		else if(!YUD.hasClass(t, 'hidden')){

			YUD.addClass(t, 'hidden');

			YUD.get(button).innerHTML = "↓ {0} ↓".format(_TM['Expand diff']);

		}

	});

});