function isEmail(email){
var pattern=/(^[\-_\.a-zA-Z0-9]+)@((([0-9]{1,3}\.){3}([0-9]{1,3})((:[0-9])*))|(([a-zA-Z0-9\-]+)(\.[a-zA-Z]{2,})+(\.[a-zA-Z]{2})?((:[0-9])*)))/;
if (email.search(pattern) == -1) {return false;}
else {return true};
}
function doSubmit() {
var formElem = document.formulier;
if (formElem.persoon.value == '' || formElem.telefoon.value == '' || formElem.email.value == '') {alert("Gelieve naam, telefoon en emailadres in te vullen.")}
else if (!isEmail(formElem.email.value)) {alert("Gelieve een geldig email adres in te vullen.")}
else {formElem.submit()}
}
function show_pic(imagesrc,winwidth,winheight){
var look='top=50,left=50,width='+winwidth+',height='+winheight+','
popwin=window.open("","",look)
popwin.document.open()
popwin.document.write('Belgian Lipizzan Studbook - Click on picture to close
')
popwin.document.close()
}
function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i