function IncrFontSize()
{
    var val = parseInt(document.body.style.fontSize,10);

    var top = (version == 'blindfriendly')? 100 : 95;

    if (val < top)
    {
        document.body.style.fontSize = val + 5 + '%';
    }
}//IncrFontSize

function DecrFontSize()
{
    var val = parseInt(document.body.style.fontSize,10);
    
    if (val > 45)
    {
        document.body.style.fontSize = val - 5 + '%';
    }
}//DecrFontSize

function CheckFieldFilled(elem)
{
    var ok = (elem.value != '');

    if (elem.id == 'mail')
    {
        if (!elem.value.match(/^([a-zA-Z0-9]|[a-zA-Z0-9]+[a-zA-Z0-9\._-]*[a-zA-Z0-9]+)@([a-zA-Z0-9]|[a-zA-Z0-9]+[a-zA-Z0-9\._-]*[a-zA-Z0-9]+)\.([a-zA-Z]{2,3})$/i))
        {
            ok = false;
        }
    }

    elem.className = (!ok)? 'required-input' : '';
}//CheckFieldFilled

function ToggleShowMore()	/* skryvacky */
{
	var elem = document.getElementById('showmore');
						
	if (elem.style.display  != '')
	{
		elem.style.display = (elem.style.display == 'block')? 'none' : 'block';
	}
	else
	{
		elem.style.display = 'block';
	}
}