// checkEmail
function checkEmail (strng) {
	var error="";
	if (strng == "") {
	 error = "you have to write your email to send to\n";
	}
	else{
	  var emails=strng.split(",");
	  //var emailReg=/^[\w-]+(\.[\w-]+)*@([a-z0-9-]+(\.[a-z0-9-]+)*?\.[a-z]{2,6}|(\d{1,3}\.){3}\d{1,3})(:\d{4})?$/;
	  var emailReg=/^[A-Za-z][A-Za-z0-9._-]*@[A-Za-z0-9][A-Za-z0-9._-]*\.[A-Za-z0-9][A-Za-z0-9._-]+$/;
	  for(i=0;i<emails.length;i++){
		if (!(emailReg.test(emails[i])))
		{
			error = emails[i]+" is not valid email\n";
		}
	  }
	}
	return error;
}

function sendData()
{
	var form = document.getElementById('mailForm');
	var error = checkEmail(form.email.value);
	if(error == ""){
		form.submit();
		return;
	}
	else
	{
		alert(error)
	}
}

function show(elem){
	elem.getElementsByTagName('img')[0].style.visibility='visible';
}

function hide(elem){
	elem.getElementsByTagName('img')[0].style.visibility='hidden'
}