function validate(elementId) {
	formField = document.getElementById(elementId);
	   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	   var address = formField.value;
		if (address == '') {
			formField.style.backgroundColor = '';
			return;
		}
	   if(reg.test(address) == false) {
		formField.style.backgroundColor = '#ffbcbc';
	      return false;
	   }
		formField.style.backgroundColor = '#c9ffbc';
	   return true;
}

function bevoreSending() {
	message = document.getElementById('mailformmessage'); 
	if (message.value == '') {
		alert(document.getElementById('mailformnomessage').innerHTML);
		return false;
	} else {
		if (document.getElementById('mailformsender').value == '') {
			return confirm(document.getElementById('mailformnosender').innerHTML);
		}
		return true;
	}
}