// De browserversie achterhalen

    var browser = new Object();
    var agent = navigator.userAgent.toLowerCase();
    browser.major = parseInt(navigator.appVersion);
    browser.minor = parseFloat(navigator.appVersion);
    browser.nav  = ( (agent.indexOf('mozilla') != -1 )
                  && (agent.indexOf('opera') == -1)
          && (agent.indexOf('compatible') == -1) );
    browser.nav2 = (browser.nav && (browser.major >= 2));
    browser.nav3 = (browser.nav && (browser.major >= 3));
    browser.nav4 = (browser.nav && (browser.major >= 4));
    browser.ie   = (agent.indexOf("msie") != -1);
    browser.ie3  = (browser.ie && (browser.major == 2));
    browser.ie4  = (browser.ie && (browser.major >= 4));

// Browser-specifieke stijlbladen

link1 = '<LINK REL="stylesheet" HREF="';
link2 = '" TYPE="text\/css">';

cssie   = '../styles/style_banner_ie.css';
cssns   = '../styles/style_banner_ns.css';

leftpos = 0;
toppos=0;
hoogte= 0;
breedte =0 ;

if (browser.nav3) {
document.write(link1 + cssns + link2);
//hoogte=400;
hoogte=450;
breedte=480;
if (screen) {
leftpos=screen.width - 600;
toppos=screen.height - 420;
}
}

if (browser.ie4)  {
document.write(link1 + cssie + link2);
//hoogte=380;
hoogte=450;
breedte=480;
if (screen) {
leftpos=screen.width - 650;
toppos=screen.height - 520;
}
}

tekstwindow = '';
zegelwindow = '';

function sluit_tekstscherm()
{
if (tekstwindow && !tekstwindow.closed) {
tekstwindow.close()} 
}

function sluit_zegelscherm()
{
if (zegelwindow && !zegelwindow.closed) {
zegelwindow.close()} 
}

function toon_zegelscherm(zegel,breedte,hoogte,leftpos,toppos)
{
sluit_zegelscherm();
if (!zegelwindow || zegelwindow.closed) {
zegelwindow = window.open(zegel,'zegelvenster','width='+breedte+',height='+hoogte+',left='+leftpos+',top='+toppos+',status=no,scrollbarrs=no,toolbar=no,menubar=no,resizable=no')
} 
//else
//{
//zegelwindow.focus()
//}
}

function toon_tekstscherm(tekst,breedte,hoogte,leftpos,toppos)
{
sluit_tekstscherm();
if (!tekstwindow || tekstwindow.closed) {
tekstwindow = window.open(tekst,'tekstvenster','width='+breedte+',height='+hoogte+',left='+leftpos+',top='+toppos+',status=no,scrollbarrs=no,toolbar=no,menubar=no,resizable=no')
} 
//else
//{
//tekstwindow.focus()
//}
}