function changeServer()
{
	document.getElementById("data_how_top").src='includes/img/data_how_server_top.gif';
	document.getElementById("data_how_bot").src='includes/img/data_how_server_bot.gif';
}

function changeCDN()
{
	document.getElementById("data_how_top").src='includes/img/data_how_cdn_top.gif';
	document.getElementById("data_how_bot").src='includes/img/data_how_bot.gif';
}

function changeServices()
{
	document.getElementById("data_how_top").src='includes/img/data_how_services_top.gif';
	document.getElementById("data_how_bot").src='includes/img/data_how_bot.gif';
}