// JavaScript Document

function empty(x)
{
	return x == '';
}

function toggle_other(){
	
  if(document.getElementById('referer').value == 'other'){
      document.getElementById('other_detail').style.display = '';
  }else{
  	  document.getElementById('other_detail').style.display = 'none'
  }
  
}

function numeric(x)
{
   var ValidChars = "0123456789.";
   var numeric=true;
   var Char; 
   for (i = 0; i < x.length && numeric == true; i++) 
   { 
     Char = x.charAt(i); 
     if (ValidChars.indexOf(Char) == -1)	 
		 	numeric = false;		 
		}
   return numeric;   
}

function email(x)
{
  email_regx = /^[^@]+@[^@]+.[a-z]{2,}$/i;
	return !(x.search(email_regx) == -1); 
}

function validate_form()
{
	$error_count = 0;
	$error_inner = '<strong>The following errors have occured...</strong><br>';
	
	/* validation start */	
	
	if(empty(document.getElementById('email_address').value))
	{		
		document.getElementById('email_label').className = 'label_error';
		$error_inner += 'You must enter an email address<br>';
		$error_count++;		
	}
	else if(!email(document.getElementById('email_address').value))
	{
		document.getElementById('email_label').className = 'label_error';
		$error_inner += 'You must enter a valid email address<br>';
		$error_count++;
	}
	else
	{		
		document.getElementById('email_label').className = 'label';
	}	
  
  
  if(empty(document.getElementById('referer').value))
  {   
    document.getElementById('referer_label').className = 'label_error';
    $error_inner += 'Please tell us how you heard about us<br>';
    $error_count++;   
  }
  else if(document.getElementById('referer').value == 'other')
  {
  	if(empty(document.getElementById('referer_detail_field').value )){
  		$error_inner += 'Please specify how you heard about us<br>';
      $error_count++;
  	}
  }
  
	$error_inner += '';
	
	if($error_count > 0)
	{
		document.getElementById('error_list').style.display = 'block';
		document.getElementById('error_list').innerHTML = $error_inner;		
		window.scrollTo(0, 0);
	}
	else
	{
		document.getElementById('error_list').style.display = 'none';
		document.getElementById('error_list').innerHTML = '';
		document.getElementById('contactusform').submit();	
	}
	
}