function hide() {
	// you must set the number of tabs here
	var numtabs = 5;
	// function
	var item
	var content
	for (i=1; i<=numtabs; i++) {
		item = "tab" + i;
		content = "content" + i;
		document.getElementById(content).style.display = "none";
		}
	}
function show(which) {
	hide();
	var content2 = "content" + which;
	document.getElementById(content2).style.display = "block";
	document.getElementById(content2).style.height = "1%";
}