function sForm(){
	var form = document.getElementById('subscribe_form');
	if(form)
	{
		if(form.email.value=="" ||
		(!/^[a-z0-9\._-]+@[a-z0-9\._-]+\.[a-z]{2,4}$/i.test(form.email.value)))
		{
			form.submit.disabled=true;
			form.email.style.color='red';
		}
		else
		{
			form.submit.disabled=false;
			form.email.style.color='green';
		}
	}
}

var submi;

window.onload = function () {
	if (document.getElementById('subscribe_form'))
	{
		 submi = setInterval("sForm()",25);
	};
}

function SendForm()
{
	var form = document.getElementById('subscribe_form');
	form.submit.value='Подождите...';
	form.submit.disabled=true;
	
	clearInterval(submi);
	return true;
}