function hide_show(name)
{
	
	if (document.getElementById(name).style.visibility == 'hidden')
	{
		document.getElementById(name).style.visibility = 'visible';
		document.getElementById(name).style.position = 'relative';
	}
	else
	{
		document.getElementById(name).style.visibility = 'hidden';
		document.getElementById(name).style.position = 'absolute';
	}
}

function change_image_src(name, url)
{
	document.getElementById(name).src = url;
}