function checkVraag1()
{
    this.document.getElementById("vraag1verder").style.display = "block";
}

function proceedVraag1()
{
    this.document.getElementById("vraag2").style.display = "block";
    this.document.getElementById("vraag1").style.display = "none";
}

function gobackVraag1()
{
    this.document.getElementById("vraag1").style.display = "block";
    this.document.getElementById("vraag2").style.display = "none";
}


function checkVraag2()
{
    this.document.getElementById("vraag2verder").style.display = "block";
}

function proceedVraag2()
{
    this.document.getElementById("vraag3").style.display = "block";
    this.document.getElementById("vraag2").style.display = "none";
}

function gobackVraag2()
{
    this.document.getElementById("vraag2").style.display = "block";
    this.document.getElementById("vraag3").style.display = "none";
}


function checkVraag3()
{
    this.document.getElementById("vraag3verder").style.display = "block";
}

function proceedVraag3()
{
    this.document.getElementById("vraag4").style.display = "block";
    this.document.getElementById("vraag3").style.display = "none";
}

function gobackVraag3()
{
    this.document.getElementById("vraag3").style.display = "block";
    this.document.getElementById("vraag4").style.display = "none";
}


function checkVraag4()
{
    this.document.getElementById("vraag4verder").style.display = "block";
}

function proceedVraag4()
{
    if (this.document.vragen.vraag4[0].checked == true)
    {
        this.document.getElementById("vraag4").style.display = "none";
        this.document.getElementById("vraag5").style.display = "block";
    }
    else if (this.document.vragen.vraag4[1].checked == true)
    {
        this.document.getElementById("vraag4").style.display = "none";
        this.document.getElementById("vraag5").style.display = "block";
    }
    else
    {
        this.document.forms[1].submit();
    }
}

function gobackVraag4()
{
    this.document.getElementById("vraag4").style.display = "block";
    this.document.getElementById("vraag5").style.display = "none";
}


function checkVraag5()
{
    this.document.getElementById("vraag5verder").style.display = "block";
}

function proceedVraag5()
{
    this.document.getElementById("vraag6").style.display = "block";
    this.document.getElementById("vraag5").style.display = "none";
}

function gobackVraag5()
{
    this.document.getElementById("vraag5").style.display = "block";
    this.document.getElementById("vraag6").style.display = "none";
}


function checkVraag6()
{
    this.document.getElementById("vraag6verder").style.display = "block";
}

function proceedVraag6()
{
    this.document.getElementById("vraag7").style.display = "block";
    this.document.getElementById("vraag6").style.display = "none";
}

function gobackVraag6()
{
    this.document.getElementById("vraag6").style.display = "block";
    this.document.getElementById("vraag7").style.display = "none";
}


function checkVraag7()
{
    this.document.getElementById("result").style.display = "block";
}


function submitResult()
{
    this.document.forms[1].submit();
}


function toonUitslag()
{
    this.document.getElementById("uitslag").style.display = "block";
}

function checkBack()
{
    this.document.vragen.vraag1[0].checked = false;
    this.document.vragen.vraag1[1].checked = false;
    this.document.vragen.vraag1[2].checked = false;
    this.document.vragen.vraag1[3].checked = false;
    this.document.vragen.vraag2[0].checked = false;
    this.document.vragen.vraag2[1].checked = false;
    this.document.vragen.vraag3[0].checked = false;
    this.document.vragen.vraag3[1].checked = false;
    this.document.vragen.vraag4[0].checked = false;
    this.document.vragen.vraag4[1].checked = false;
    this.document.vragen.vraag4[2].checked = false;
    this.document.vragen.vraag5[0].checked = false;
    this.document.vragen.vraag5[1].checked = false;
    this.document.vragen.vraag6[0].checked = false;
    this.document.vragen.vraag6[1].checked = false;
    this.document.vragen.vraag6[2].checked = false;
    this.document.vragen.vraag7[0].checked = false;
    this.document.vragen.vraag7[1].checked = false;
}

function printPage()
{
    window.print();
}

function SetFontSize()
{
    if(document.getElementById('contentMain'))
    {
        if(document.getElementById('contentMain').style.fontSize == '12px')
        {
            document.getElementById('contentMain').style.fontSize='14px';   
        }
        else
        {
            document.getElementById('contentMain').style.fontSize='12px';   
        }
    }
    
    if(document.getElementById('contentSub'))
    {
        if(document.getElementById('contentSub').style.fontSize == '12px')
        {
            document.getElementById('contentSub').style.fontSize='14px';   
        }
        else
        {
            document.getElementById('contentSub').style.fontSize='12px';   
        }
    }
    
}