$(document).ready(function(){
    $('#templates').change(function(event) {
        var url = "config.php?templates=" + $("#templates option:selected").val() + "&step=1";
        $.getJSON(url, function(data) {
            var count_data = data.length;
			var url = data;
			changeIframeSrc('ifrm', url);
        });
    });
});