tabCount = 4;
function changeTab(tabIndex){
	for (i = 1; i <= tabCount; i++){
		tab = document.getElementById("Tab" + i);
		text = document.getElementById("Text" + i);
		content = document.getElementById("Content" + i);
		
		if (i == tabIndex){
			tab.className = "active";
			text.className = "news_tit_font1";
			content.className = "activecontent";
		}
		else{
			tab.className = "hidden";
			text.className = "news_tit_font2";
			content.className = "hiddencontent";
		}
	}
}