function cancel_signin(el) {
	Effect.BlindUp('signin', {duration:0.25, queue:'end'});
	Effect.BlindDown(el, {duration:0.25, queue:'end'});
	setTimeout("$('signin').remove();", 500 );
}
function submitForm(el, ajaxUrl) {
	new Ajax.Request(ajaxUrl, {asynchronous:true, evalScripts:true, parameters:Form.serialize($(el))});
	return false;
}