var get     = location.search.replace("?", "");
var get_ar  = get.split("&");
for(var i = 0; i < get_ar.length; i++)
{
   var get_lin = get_ar[i].split("=");
   eval('var $_GET_' + get_lin[0] + ' = "' + get_lin[1] + '";');
}


function goto(url)
{
    window.open(url, '_self');
}

function goto_back_there()
{
    goto('index.php?step=' + ($_GET_step - 1));
}