function showChart(p_id) {
	var chart_array = new Array('points', 'friends2');	// comma-separated names of the div IDs you want to be affected.
	var link_array = new Array('top_users', 'top_users_friends');	// links match order of the above array
	
	for (i = 0; i < chart_array.length; i++) {
		var my_div = document.getElementById('chart_' + chart_array[i]);
		var my_btn = document.getElementById('btn_' + chart_array[i]);
		
		if (p_id == chart_array[i]) {
			my_div.style.display = 'inline';
			my_btn.src = 'img/btn-' + chart_array[i] + 'On.gif';
			document.getElementById('top100link').href = 'section/' + link_array[i];
		} else {
			my_div.style.display = 'none';
			my_btn.src = 'img/btn-' + chart_array[i] + 'Off.gif';
		}
	}
}

function changeSelectBox(){
	var changedValue=document.changeForm.thisSelect.value;
	if(changedValue == 'music'){
		second_genres.style.display = 'inline';
	} else if(changedValue != 'music'){
		second_genres.style.display = 'none';
	}

}