function getElementsByClassName(classname, node) {
	if(!node) node = document.getElementsByTagName("body")[0];
	var a = [];
	var re = new RegExp('\\b' + classname + '\\b');
	var els = node.getElementsByTagName("*");
	for(var i=0,j=els.length; i<j; i++)
		if(re.test(els[i].className))a.push(els[i]);
	return a;
}
function switchTab (tabName, url) {
	var tabs = document.getElementById('tabs').getElementsByTagName("li");
	for (i = 0; i < tabs.length; i++) {
		tabs[i].className='';
	}
	document.getElementById(tabName).className='active';
	new Ajax(url, {
		method: 'get',
		update: $('tabs_content')
	}).request();
}
function openFirstTab(){
	var tabs = document.getElementById('tabs').getElementsByTagName("li");
}