function wopen(wlink, w, h) {
	w+=40;
	h+=130;
	scrollbar='no';
	if (w>900) {w=900; scrollbar='yes';}
	if (w<400) {w=400;}
	if (h>730) {h=730; scrollbar='yes';}
	if (h<400) {h=400;}
  xx=(screen.availWidth-w)/2;
  yy=(screen.availHeight-30-h)/2;
  if (xx<1) xx=0;
  if (yy<1) yy=0;
	param="location=no, menubar=no, personalbar=no, status=no, toolbar=no, resizable=yes, scrollbars="+scrollbar;
  okno=window.open("image-large.php?p="+wlink, "mg"+Math.floor(Math.random()*1000000), param+", width="+w+", height="+h+", left="+xx+", top="+yy);
}


function CheckContactForm(obj) {
	// antispam
	obj.action='cf-kontakt-form-send.php';
	objc1=document.getElementById('c1');
	objc2=document.getElementById('c2');
	objc2.value=objc1.value*3+33654;
	return true;
}


function CheckNewsForm(obj) {
	// kontrola formulare na registraci do newsletteru
	re=/^([-_a-zA-Z0-9]+(\.?[-a_a-zA-Z0-9]+)*)+@[-a-zA-Z0-9]+(\.[-a-zA-Z0-9]+)*\.[a-zA-Z]{2,6}$/;
	r=obj.email.value.search(re);
	if (r==-1) {
		window.alert('Zadejte prosím Váš platný email.');
		return false
	}
	return true;
}