function ProcessLogin(form){
	var S
	new Ajax.Request('signin_json.php', {
		postBody: $('SignupForm').serialize(),
		asynchronous: false,
		onSuccess: function(t){
			var Response = t.responseText.evalJSON()
			if(!Response.Success)
				alert(Response.Message)
			S = Response.Success
			} }) // End AJAX request
	return S
}