function preview(name){
	openwin('http://www.aaaahotels.com/popup.php?p=http:/'+'/www.aaaahotels.com/pictures/'+name,200,100);
}

function validate(){
		form=document.forms['reservation'];
		if(form.name.value.length<2){
			alert('Name is missing!');
			return;
		}
		if(form.text.value.length<2){
			alert('Text is missing!');
			return;
		}
		if(form.elements['od'].value.length<6){
			alert('Arrival date is missing!');
			return;
		}
		if(form.elements['do'].value.length<6){
			alert('Departure date is missing!');
			return;
		}
		if(form.elements['numpers'].value.length<1){
			alert('Number of Persons is missing!');
			return;
		}
		email=true;
		if(form.email.value.length<5){
			email=false;
		}
		else{
			if(!checkMail(form.email.value)) email=false;
		}
		if(!email){
		alert('Wrong E-mail!');
			return;
			}
		form.submit();
	}
	
	function checkMail(x) {
  	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
  	if (filter.test(x)) return true;
  	return false;
  }