/* prototype.js and scriptaculous.js are required for functions to work */

function irb_toggle(element_id) {
	if(Element.visible(element_id)) {
	//if(document.getElementById(element_id).style.display=='none') {
		collapse(element_id);
	} else {
		expand(element_id);
	}
}

function expand(element_id) {
	var arrow_element_id = element_id + '_arrow';
        //document.getElementById(element_id).style.display='';
        //document.getElementById(arrow_element_id).src='../images/arrow_down.gif';
	//Element.show(element_id);

	$(arrow_element_id).src='../images/arrow_down.gif';
	Effect.Appear(element_id,{duration:1.0});
}

function collapse(element_id) {
	var arrow_element_id = element_id + '_arrow';
	
        //document.getElementById(element_id).style.display='none';
        //document.getElementById(arrow_element_id).src='../images/arrow_right.gif';
	//Element.hide(element_id);

	$(arrow_element_id).src='../images/arrow_right.gif';
	Effect.Fade(element_id,{duration:1.0});
}

function expand_all(dropdown_element_ids) {
        document.getElementById('show_all').style.display='none';
        document.getElementById('hide_all').style.display='';
        for(i=0; i<= dropdown_element_ids.length; i++) {
                expand(dropdown_element_ids[i]);
        }
}

function collapse_all(dropdown_element_ids) {
        document.getElementById('show_all').style.display='';
        document.getElementById('hide_all').style.display='none';
        for(i=0; i<= dropdown_element_ids.length; i++) {
                collapse(dropdown_element_ids[i]);
        }
}