function change_city(val, num) {

    if (num<2) {
	if (document.getElementById("frm_birth_year")) {
	    var sYear = document.getElementById("frm_birth_year").value;
	} else {
	    var sYear = "";
	}
    } else {
	if (document.getElementById("frm_birth_year2")) {
	    var sYear = document.getElementById("frm_birth_year2").value;
	} else {
	    var sYear = "";
	}
    }

    action_loader();
    $.blockUI({
	    message: '',
		showOverlay: true,
		overlayCSS: {
		backgroundColor: '#fff',
		opacity: 0.3
	    },
		    css: {
		backgroundColor: 'none',
		border: 'none'
	    }
    });

    $.getJSON('http://astro-online.ru/ajax/ajax.city.php', 
	{city: val, birthyear: sYear},
	function(json) {
	    if (num<2) {
		document.getElementById("time_gmt").value = json.GMT;
		document.getElementById("N").value = json.N;
		document.getElementById("E").value = json.E;
	    } else {
		document.getElementById("time_gmt_syn").value = json.GMT;
		document.getElementById("N2").value = json.N;
		document.getElementById("E2").value = json.E;
	    }
	    $("#a_loader").html("&nbsp;");
	    $.unblockUI();
    });
}

function change_city2(val) {

    var sYear2 = document.getElementById("birth_year2").value;
    action_loader();
    $.blockUI({
	    message: '',
		showOverlay: true,
		overlayCSS: {
		backgroundColor: '#fff',
		opacity: 0.3
	    },
		    css: {
		backgroundColor: 'none',
		border: 'none'
	    }
    });

    $.getJSON('http://astro-online.ru/ajax/ajax.city.php', 
	{city: val, birthyear: sYear2},
	function(json) {
	    document.getElementById("time_gmt_syn").value = json.GMT;
	    document.getElementById("N2").value = json.N;
	    document.getElementById("E2").value = json.E;
	    $("#a_loader").html("&nbsp;");
	    $.unblockUI();
    });
}

function action_loader() {
    $("#a_loader").html("<img src=http://astro-online.ru/img/a_loader.gif>&nbsp;");
}