function display_item (id)
{
	document.getElementById(id).style.display ='block';
}

function hide_item (id)
{
	document.getElementById(id).style.display ='none';
}

function display_group (items)
{
	for (var i=0; i<items.length ; i++)
	{
		document.getElementById(items[i]).style.display ='block';
	}
}

function hide_group (items)
{
	for (var i=0; i<items.length ; i++)
	{
		document.getElementById(items[i]).style.display ='none';
	}
}

function js_redirect (url,stringModel,value)
{
	url = url.replace(stringModel,value);
	window.location = url;
}

function display_div (id_group,id_item)
{	
	var items = document.getElementById(id_group).getElementsByTagName('div');
	
	for (var i=0; i<items.length ; i++)
	{
		if (id_group+i == id_item)
		document.getElementById(id_group+i).style.display ='block';
		else
		document.getElementById(id_group+i).style.display ='none';
	}
}