/*
 * Javascript Functions file for
 * Berufsschule II Bamberg
 * Author: Christian Schiling (cs@stateofweb.de)
 */

is_visible=false;

function toggle_login() {

	if($('login_form_wrapper')) {

		login_slider=$('login_form_wrapper');
		
		if(!is_visible) {

			new Effect.Opacity($('logo'), {duration:0.7, from:1.0, to:0.0});
			new Effect.BlindDown(login_slider);
			is_visible = true;
		} else {
			new Effect.Appear($('logo'));
			new Effect.BlindUp(login_slider);
			is_visible = false;
		}


	}
}

function emptyElement(element, value) {

	if($(element) && $(element).value==value) {

		$(element).value="";
	}

}