function changeSelect(d_class) { }

function menuSchuiven()
{
	if (document.getElementById('menu').style.display== 'block'	)
	{
		document.getElementById('menu').style.display='none';
	}
	else
	{
		document.getElementById('menu').style.display='block';
	}

}

//---------------------

function font_enlarge(url)
{
	if(document.getElementById('letterGrootte').style.fontSize == '11px')
    {
        document.getElementById('letterGrootte').style.fontSize = '13px'
        document.getElementById("myImage").src=url+"/images/knoppen-boven-letter-1.gif";
    }
    else if(document.getElementById('letterGrootte').style.fontSize == '13px')
    {
        document.getElementById('letterGrootte').style.fontSize = '15px'
        document.getElementById("myImage").src=url+"/images/knoppen-boven-letter-2.gif";
    }
    else if(document.getElementById('letterGrootte').style.fontSize == '15px')
    {
        document.getElementById('letterGrootte').style.fontSize = '17px';
        document.getElementById("myImage").src=url+"/images/knoppen-boven-letter-3.gif";

    }
    else if(document.getElementById('letterGrootte').style.fontSize == '17px')
    {
        document.getElementById('letterGrootte').style.fontSize = '11px';
        document.getElementById("myImage").src=url+"/images/knoppen-boven-lettergrootte.gif";

    }
    else
    {
        if(document.getElementById('letterGrootte').style.fontSize != '17px')
        {
            document.getElementById('letterGrootte').style.fontSize = '13px';
       		document.getElementById("myImage").src=url+"/images/knoppen-boven-letter-1.gif";
        }
    }
}

function print_page()
{
    var disp_setting  ='toolbar=no,location=no,directories=no,menubar=no,';
        disp_setting +='scrollbars=yes,width=700, height=500, left=100, top=25';
    var content_value = document.getElementById('letterGrootte').innerHTML;

    var docprint=window.open('','',disp_setting);
        docprint.document.open();
        docprint.document.write('<html><head><title>SDU Uitgevers - Formulierenloket.nl</title>');
        docprint.document.write('<link type="text/css" rel="stylesheet" href="print.css" />');
        docprint.document.write('</head><body onLoad="self.print()"><div class="print">');
        docprint.document.write(content_value);
        docprint.document.write('</div></body></html>');
        docprint.document.close();
        docprint.focus();
}

function checkForm()
{
	varEmail = document.getElementById('email').value;

	if(varEmail == '' || varEmail == 'uw e-mail adres')
	{
		alert('Vergeet niet uw e-mail adres in te vullen');
	}
	else
	{
		var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,5}$/;
		if(document.getElementById('email').value.match(emailExp))
		{
			document.getElementById('nbForm').submit();
		}
		else
		{
			alert('U heeft geen geldig e-mail adres opgegeven');
		}
	}
}

function openWindow(url) {
	window.open(url,'Sdu webshop','width=800,height=600,scrollbars=yes,toolbar=no,location=no');
	return false;
}

function showOptions(obj) {
	if(obj.value == 'naw') {
		$('#naw').css('display', 'block');
		$('#afbeelding').css('display', 'none');
	}
	else if(obj.value == 'afbeelding') {
		$('#naw').css('display', 'none');
		$('#afbeelding').css('display', 'block');
	}
}