window.onload = function(){
	showColum('class_top');
	setTabClick('topNav','class_top');
	setTabClick('charaNav','class_chara');
	setTabClick('detailNav','class_detail');
	setTabClick('exNav','class_ex');
	setTabClick('voiceNav','class_voice');
	setTabClick('nyNav','class_ny');
	setTabClick('profileNav','class_profile');
};

function hide(elementId) {
	document.getElementById(elementId).style.display = "none";
}
function show(elementId) {
	document.getElementById(elementId).style.display = "block";
}
/*function hideHeading() {
	hide('topHeading');
	hide('charaHeading');
	hide('detailHeading');
	hide('exHeading');
	hide('voiceHeading');
	hide('nyHeading');
	hide('profileHeading');
	
}
*/function showColum(columName){
	hide('class_top');
	hide('class_chara');
	hide('class_detail');
	hide('class_ex');
	hide('class_voice');
	hide('class_ny');
	hide('class_profile');
	show(columName);
}

function setTabClick(listName,columName) {
	var e = document.getElementById(listName).getElementsByTagName('a')[0];
	e.onclick = function(){
		showColum(columName);
		return false;
	};
}