/*
(c) Euona LLC
@pre tab "id" must have the format: "tab" + index number (starting with 1)
*/
var tabs = function()
{
	var tabs = document.getElementsByName('tab');
	var n = tabs.length;
	var i = 0;
	while(i<n)
	{
		tabs[i].onclick = new Function('tabs.activate(this);');
		++i;
	}
	
	tabs.activate = function(tab)
	{
		var n = this.length;
		var i = 0;
		while(i<n)
		{
			tabs[i].className = tabs[i].className.replace(/tab-active/,'');
			++i;
		}
		tab.className = 'tab-active';
	};
	
	return tabs;
}();