window.onload = function(){
	hideHeading();
	showContents('project');
	setTabClick('tabProject','project');
	setTabClick('tabProfile','profile');
	/* setTabClick('navRecruit','recruit'); */
};

function hideHeading() {
	hide('projectHeading');
	hide('profileHeading');
	/* hide('recruitHeading'); */
}

function showContents(contentName){
	hide('project'); 
	hide('profile'); 
	/* hide('recruit'); */
	show(contentName);
	chengeTabs(contentName);
}
function chengeTabs(contentName){
	var e = document.getElementById('tab');
	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 = "";
}