var old;
var oldTab;

function initGraph(id)
{
	if (old != null) { 
		old.style.display = "none";
		oldTab.style.color = "#555555";
	};
	
	cur = document.getElementById('year'+id);
	cur.style.display = 'block';
	curTab = document.getElementById('yearTab'+id);
	curTab.style.color = '#FF0000';
	
	old = cur;
	oldTab = curTab;
}

function isblank(s)
{
    for (var i = 0; i < s.length; i++)
    {
        var c = s.charAt(i);
        if ((c != ' ') && (c != '\n') && (c != '\t'))
            return false;
    }
    return true;
}

function verifyComment(f)
{
    var empty_fields = new Array();
    
    f.name.mandatory = true;
    f.email.mandatory = true;
    f.comment.mandatory = true;
    f.captcha.mandatory = true;
    
    for (var i = 0; i < f.length; i++)
    {
        var e = f.elements[i];
        if (((e.type == 'text') || (e.type == 'textarea')) && e.mandatory)
        {
            document.getElementById('error_' + e.name).style.display = 'none';
            document.getElementById(e.name).style.borderTop = '1px solid #CCC';
			document.getElementById(e.name).style.borderRight = '1px solid #CCC';
			document.getElementById(e.name).style.borderBottom = '1px solid #CCC';
			document.getElementById(e.name).style.borderLeft = '3px solid #CCC';
            if ((e.value == null) || (e.value == '') || isblank(e.value))
            {
                empty_fields.push(e.name);
                continue;
            }
        }
    }
    
    if (empty_fields.length == 0) return true;

    if (empty_fields.length > 0)
    {
        for (var i = 0; i < empty_fields.length; i++)
        {
            document.getElementById(empty_fields[i]).style.borderTop = '1px solid #C33';
			document.getElementById(empty_fields[i]).style.borderRight = '1px solid #C33';
			document.getElementById(empty_fields[i]).style.borderBottom = '1px solid #C33';
			document.getElementById(empty_fields[i]).style.borderLeft = '3px solid #C33';
            new Effect.Pulsate('error_' + empty_fields[i], {duration: 2.0, from: 0.5, afterFinish: showErrorMessages(empty_fields)});
        }
    }
    
    return false;
}

function showErrorMessages(e)
{
    for (var i = 0; i < e.length; i++)
    {
        document.getElementById('error_' + e[i]).style.display = 'block';
    }
}