var opened_elem = ""

function toggle_menu(elem){
	if(document.getElementById(elem).style.display=='') {
		if(opened_elem == elem){
			opened_elem = ""
		}
		effect_1 = Effect.SlideUp(elem,{duration:0.75});
	}
	else{
		if(opened_elem != ""){
			effect_1 = Effect.SlideUp(opened_elem,{duration:0.25});
		}
		opened_elem = elem
		effect_2 = Effect.SlideDown(elem,{duration:0.75});
	}
	return false;
}