var tab_count = 6;

function hide_all() {
	for (var i=1;i<=tab_count;i++) {
	document.getElementById('tab_content_'+i).style.display = "none";
	document.getElementById("tab_"+i).setAttribute("className", "");
	document.getElementById("tab_"+i).setAttribute("class", "");
		document.getElementById("tab_4").setAttribute("className", "lastItem");
		document.getElementById("tab_4").setAttribute("class", "lastItem");

	}
}
function show_hide(obj) {
	theObj = document.getElementById("tab_content_"+obj);
	if (theObj.style.display == "none") {
		hide_all();
		theObj.style.display = "block";
		document.getElementById("tab_"+tab_count).setAttribute("class", "lastItem");

		document.getElementById("tab_"+obj).setAttribute("className", "activeTab");
		document.getElementById("tab_"+obj).setAttribute("class", "activeTab");

	}
		document.getElementById("tab_4").setAttribute("class", "lastItem");
}