var site_url = 'http://empireformula.com/';
var redirect_url = site_url + 'leads/optin_thanks.php';
var cookie_expiry = 30; //'1318683553';
var cookie_path = '/';
var cookie_domain = '.empireformula.com';

var  email;
var  fname;
//var  lname;
var  system_id;
var params='?';

function opt_validateEmail()
{
  var emailRegEx = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
  email = document.getElementById('fields_email').value;
  fname = document.getElementById('fields_fname').value;
  //lname = document.getElementById('fields_lname').value;
  system_id = document.getElementsByName('fields_system_id').item(0).value;
  
  var error = "";
  
  if(fname == "" || fname == null)
  {
     error += 'Please enter first name.\n';
  }
  
  /*if(lname == "" || lname == null)
  {
     error += 'Please enter last name.\n';
  }*/
  
  if(!email.match(emailRegEx))
  {
    error += 'Please enter a valid email address.';
  }
  if(error != "")
  {
    alert(error);
    return false;
  }
  else
  {   
  	optSetCookie('email', email, cookie_expiry, cookie_path, cookie_domain);
  	optSetCookie('fname', fname, cookie_expiry, cookie_path, cookie_domain);
  	//optSetCookie('lname', lname, cookie_expiry, cookie_path, cookie_domain);
  	optSetCookie('systemid', system_id, cookie_expiry, cookie_path, cookie_domain);
  	optSetCookie('prelaunch_visited', 'true', cookie_expiry, cookie_path, cookie_domain);
  	params += 'email=' + encodeURIComponent(email) + '&';
  	params += 'fname=' + fname + '&';
  	//params += 'lname=' + lname + '&';
  	params += 'systemid=' + system_id + '&';
  	setTransferUrl();
    return true;
  }
  
}

function opt_do_form_submit()
{
  if(opt_validateEmail())
  {
    return true;
  }
  else
  {
    return false;
  }  
}
function optUpdateForm()
{ 
    frms = document.getElementsByTagName('Form');
    
    for(var i = 0; i < frms.length; i++)
    {
		if(frms[i]){  // there is only one form in all pages	
	    	if(frms[i].addEventListener){
	    	    frms[i].onsubmit = opt_do_form_submit;
	      		//frms[i].addEventListener('submit', opt_do_form_submit, false); 
	    	} else if(frms[i].attachEvent){		
	      		frms[i].attachEvent('onsubmit', opt_do_form_submit, false);
	    	}
	    }
    }

  custom_aff_ids = document.getElementsByName('fields_aff_id');  
  var aff_id = optGetCookie('affiliate');
  for(var i = 0; i < custom_aff_ids.length; i++)
  {
      if(aff_id != "" && aff_id != "undefined")
      	custom_aff_ids.item(i).value = aff_id;      
  }
  
  if (aff_id)
  params += 'affiliate=' + aff_id + '&';
  
  custom_sub_ids = document.getElementsByName('fields_sub_id');
  var sub_id = optGetCookie('subid');
  for(var i = 0; i < custom_sub_ids.length; i++)
  {
      custom_sub_ids.item(i).value = sub_id;      
  }
  
  if (sub_id)
  params += 'subid=' + sub_id + '&';
  
  custom_system_ids = document.getElementsByName('fields_system_id');
	  var sys_id = optGetCookie('systemid');
  for(var i = 0; i < custom_system_ids.length; i++)
  {
	  if(sys_id != "" && sys_id != "undefined")
	  {
      	custom_system_ids.item(i).value = sys_id;
      }
  }


}

function optSetCookie(c_name, value, expiredays, path, domain)
{
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	
 	var cookie_string = c_name + "=" + encodeURIComponent(value);

	if(expiredays)
		cookie_string += "; expires=" + exdate.toGMTString();
	
	if(path)
		cookie_string += "; path=" + escape(path);
	
	if(domain)
		cookie_string += "; domain=" + escape(domain);
	    
	document.cookie = cookie_string;	
}

function optGetCookie(c_name)
{
	if (document.cookie.length>0)
	{
		c_start=document.cookie.indexOf(c_name + "=");
		if (c_start!=-1)
		{ 
			c_start=c_start + c_name.length+1; 
			c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1) c_end=document.cookie.length;
			return unescape(document.cookie.substring(c_start,c_end));
		} 
	}
	return "";
}

function optLoad()
{
  window.onload = optUpdateForm;
}

function setTransferUrl()
{
  redirects = document.getElementsByName('redirect');
  transfer_urls = document.getElementsByName('fields_transfer_url');

  for(var i = 0; i < redirects.length; i++)
  {  
      if(redirects.item(i).value!=redirect_url)
      {      
        transfer_urls.item(i).value = redirects.item(i).value;
        params += 'fields_transfer_url=' + transfer_urls.item(i).value + '&';
        redirects.item(i).value = redirect_url + params;
        optSetCookie('fields_transfer_url', transfer_urls.item(i).value, cookie_expiry, cookie_path, cookie_domain);
      }      
  }
}

optLoad();