function eraser(elmt, str) {
	if (elmt.value == str) {
		elmt.value = '';
	}
}

function setDefaultValue(elmt, str) {
	if (elmt.value == '') {
		elmt.value = str;
	}
}

function callback() {
	new Ajax.Updater(
		$('callback_return'),
		'/',
		{
			method: 'get',
			parameters: 'call_name=' + $('call_name').value + '&call_num='+$('call_num').value,
			onComplete: function(t) {
				$('callback_return').innerHTML = t.responseText;
				new Effect.Appear('callback_return');
				window.setTimeout("Effect.Fade('callback_return')",2500);
			}
		}
	)
}
	
function newsletter() {
	new Ajax.Updater(
		$('newsletter_return'),
		'/',
		{
			method: 'get',
			parameters: 'email_addr=' + $('email_addr').value,
			onComplete: function(t) {
				$('newsletter_return').innerHTML = t.responseText;
				new Effect.Appear('newsletter_return');
				window.setTimeout("Effect.Fade('newsletter_return')",2500);
			}
		}
	)
}