var setActive = function(element_o)
{
	if(element_o)
	{
		var current_de = document.getElementById(element_o);
			current_de.className = 'active';
	}
};

function setDisplay(element_o)
{
	document.getElementById(element_o).style.display = document.getElementById(element_o).style.display ? '' : 'none';
}

function setImageSwith(element_o, from_s, to_s)
{
	if(element_o)
	{
    	img_a = element_o.getElementsByTagName('img');

		if (typeof img_a[0] != 'undefined')
    		img_a[0].src = img_a[0].src.replace(from_s, to_s);
    }
};