var opened_wins = 0;

function toggle(win_id, button, mode){

	var win = document.getElementById(win_id);

	if( win!==null
	 && typeof(win)!='undefined'
	 && typeof(win.style)!='undefined'
	 && typeof(win.style.display)!='undefined' ){

		if( typeof(mode) == 'undefined' || (mode!='block' && mode!='none') ){
			var mode = ( ( win.style.display == 'none' || win.style.display == '' )
				? 'block' : 'none' );
		}

 		win.style.display = mode;
 		
 		button.style.color = mode=='block' ? '#942929' : '';

		if( button.className == 'from_button_opened' ||  button.className == 'from_button_closed' ){
			button.className = mode=='block' ? 'from_button_opened' : 'from_button_closed';
		  button.style.textDecoration = mode=='block' ? 'underline' : 'none';

			opened_wins += mode=='block' ? 1 : -1;
		  hostel_on_google_maps_logo = document.getElementById("hostel-on-google-maps-logo");
		  hostel_on_google_maps_logo.style.display = opened_wins==0 ? 'block' : 'none';
		}
	}
	return false;
}