window.onload = initiateGroups;

function initiateGroups() {
    if (document.getElementById("signup")) {
	    var getButtons = document.getElementById("signup").getElementsByTagName("input");

	    for (var i=0; i<getButtons.length; i++) {
	        if ((getButtons[i].getAttribute("rel"))) {
	            //var getTab = document.getElementById(getButtons[i].getAttribute("rel"));
	            getButtons[i].onclick = new Function("toggleGroup('"+getButtons[i].getAttribute("rel")+"')");
	        }
	    }
    }
}

function toggleGroup(enable) {
	var getGroups = document.getElementById("signup").getElementsByTagName("div");

	for (var i=0; i<getGroups.length; i++) {
	    if ((getGroups[i].className == "on" || getGroups[i].className == "off")) {
	        if (getGroups[i].id == enable) {
		        getGroups[i].className = "on";
		        //var getTab = document.getElementById(getGroups[i].getAttribute("rel"));
		        //getTab.style.display = "";
	        } else {
		        getGroups[i].className = "off";
		        //var getTab = document.getElementById(getGroups[i].getAttribute("rel"));
		        //getTab.style.display = "none";
	        }
	    }
	}
}