/*
window.onload = function(){
	hideHeading();
	showContents('company');
	setTabClick('navCompany','company');
	setTabClick('navService','service2');
	setTabClick('navRecruit','recruit');
	setTabClick('navtest2','test2');
};
*/

function setContents(contentName){
	hideHeading();
	showContents(contentName);
	setTabClick('navCompany','company');
	setTabClick('navService','service2');
	setTabClick('navRecruit','recruit');
	setTabClick('navtest2','test2');
};

function hideHeading() {
	hide('companyHeading');
	hide('serviceHeading');
	hide('recruitHeading');
	hide('testHeading');
}

function showContents(contentName){
	hide('company'); 
	hide('service2'); 
	hide('recruit'); 
	hide('test2'); 
	show(contentName);
	chengeTabs(contentName);
}
function chengeTabs(contentName){
	var e = document.getElementById('nav');
	e.className = contentName;
}

function setTabClick(li,div) {
	var e = document.getElementById(li).getElementsByTagName('a')[0];
	e.contents = div;
	e.onclick = function(){
		showContents(this.contents);
		return false;
	};
}

function hide(elementId) {
	document.getElementById(elementId).style.display = "none";
}
function show(elementId) {
	document.getElementById(elementId).style.display = "";
}