function setBlockVisible(id){
	var items=$.getByClass("descriptionarea",$.getById("maincontent"));
	for(counter=0;counter<items.length;counter++){
		currItem = $.getById(items[counter].id + '-link');
		if (currItem){
			currItem.className = '';
			items[counter].style.display = 'none';
		}
	}

	initDiv = $.getById(id);
	if (initDiv){
		initDiv.style.display = 'block';
		initLink = $.getById(id + '-link');
		initLink.className = 'lit';
	}
}

$.addOnload(initTab);