function linkButton(form_id, message, href)
{	
	if(confirm(message))
	{
		form = $(form_id);
		form.set('send', {onSuccess: function(responseText, responseXML){
			location.href = href;
		}});
		
		if(form.onsubmit())
		{
			form.send();
		}
	}
	else
	{
		location.href = href;
	}
}

function forceNumber(field)
{
	field.value = field.value.replace(/\D/g, '');
}