// JavaScript Document

function check()
{

if(document.comments.email.value=="")
{
alert("Please,Enter the email  address");
document.comments.email.focus();
return false;
} 
if(document.comments.femail.value=="")
{
alert("Please,Enter the Friend email  address");
document.comments.femail.focus();
return false;
} 
if (!isValidEmail(document.comments.email.value))
  {
    alert("Please enter appropriate  value for the \"Email\" field.");
    document.comments.email.focus();
    return (false);
  }
 
if(document.comments.your_name.value=="")
{
alert("Please,Enter the First Name");
document.comments.your_name.focus();
return false;
}
if(document.comments.f_comments.value=="")
{
alert("Please,Enter the Message");
document.comments.f_comments.focus();
return false;
}
function isValidEmail(address) {
	if (address.indexOf('@') < 3) return false;
	var name = address.substring(0, address.indexOf('@'));
	var domain = address.substring(address.indexOf('@') + 1);
	if (name.indexOf('(') != -1 || name.indexOf(')') != -1 || name.indexOf('<') != -1 || name.indexOf('>') != -1 || name.indexOf(',') != -1 || name.indexOf(';') != -1 || name.indexOf(':') != -1 || name.indexOf('\\') != -1 || name.indexOf('"') != -1 || name.indexOf('[') != -1 || name.indexOf(']') != -1 || name.indexOf(' ') != -1) return false;
	if (domain.indexOf('(') != -1 || domain.indexOf(')') != -1 || domain.indexOf('<') != -1 || domain.indexOf('>') != -1 || domain.indexOf(',') != -1 || domain.indexOf(';') != -1 || domain.indexOf(':') != -1 || domain.indexOf('\\') != -1 || domain.indexOf('"') != -1 || domain.indexOf('[') != -1 || domain.indexOf(']') != -1 || domain.indexOf(' ') != -1) return false;
	return true;
}
}