// JavaScript Document

function activate_teaser(obj) {

	var inactiveClassName = 'teasersmall';
	var activeClassName = 'teaserbig';
	
	if(obj.className == activeClassName)
	return;
	
	var allElems = obj.parentNode.childNodes;
	obj.className = activeClassName;

	for(var i=0; i<allElems.length; i++) {
	
		if( allElems[i] != obj && allElems[i].className == activeClassName) {
			allElems[i].className = inactiveClassName;
		}
	}
}

function activate_first() {
	
	var inactiveClassName = 'teasersmall';
	var activeClassName = 'teaserbig';
	
	var allElems = getElementsByClassName(inactiveClassName);
	

	
			allElems[allElems.length-1].className = activeClassName;
			return;
			
		
	
}

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;

}