function check(theform) {

var checkerror="0";
	
	email = theform.email.value;

	// document.getElementById("error_action").style.display = "block";
	
	if (theform.form.checked) {
		checkerror="0";
		document.getElementById("error_action").style.display = "none";
	}
	if (emailcheck(email)==false) {
		checkerror="1";
		document.getElementById("error_email").style.display = "block";
	}
		
	if (theform.name.value == '') {
		document.getElementById("error_name").style.display = "block";
		checkerror="1";
	}		
		
	if (theform.message.value == '') {
		document.getElementById("error_message").style.display = "block";
		checkerror="1";		
	}		
		

	if (checkerror == "1") { return false; } else { return true; }
}

function emailcheck(src) {
  var regex = /^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
  return regex.test(src);
}