function checkForm() {

	var form=document.contact;

	if (!form.name.value || form.name.value==" ")
	{
	alert('Please tell us your name.');
	form.name.focus();
	return (false);
	}
	
	
	if (!form.address.value || form.address.value==" ")
	{
	alert('Please tell us your address.');
	form.address.focus();
	return (false);
	}	
	
	if (!form.postcode.value || form.postcode.value==" ")
	{
	alert('Please tell us your postcode.');
	form.postcode.focus();
	return (false);
	}		
	
	if (!form.email.value || form.email.value==" ")
	{
		alert('Please tell us your email address.');
		form.email.focus();
		return (false);
	}
	else
	{
		mail=form.email.value.indexOf('@');
		if (mail<1) {
			alert('Please enter a valid email address.');
			form.email.focus();
		return (false);
		}
	}
	
	if (typeof(form.child_name) != 'undefined'){
		if (!form.child_name.value || form.child_name.value==" ")
		{
			alert('Please tell us your child\'s name.');
			form.child_name.focus();
			return (false);
		}		
	}
	
	if (typeof(form.child_dob) != 'undefined'){
		if (!form.child_dob.value || form.child_dob.value==" ")
		{
			alert('Please tell us your child\'s date of birth.');
			form.child_dob.focus();
			return (false);
		}			
	}
	
	if (!form.details.value || form.details.value==" ")
	{
	alert('Please tell us your event details.');
	form.details.focus();
	return (false);
	}	
	

}