function checkLinkForm()
{
  if (document.feedback.name.value.length < 1)
  	{
	 	   alert("Please enter your name.");
		   document.feedback.name.focus();
           return false;
	}
	
  if (document.feedback.email.value.length < 1)
  	{
	 	   alert("Please enter an Email address.");
		   document.feedback.email.focus();
           return false;
	}
	
  if (document.feedback.email.value.length > 0)
          {
          	     
          if ((document.feedback.email.value.indexOf("@") == -1))
          {
           alert("Please enter a valid Email address, that contains an '@' and a '.'");
		   document.feedback.email.focus();
           return false;
          }
    
          if ((document.feedback.email.value.indexOf(".") == -1))
          {
           alert("Please enter a valid Email address, that contains an '@' and a '.'");
		   document.feedback.email.focus();
           return false;
          }
      } 

  if (document.feedback.link_url.value.length < 1)
  	{
	 	   alert("Please enter a Link URL.");
		   document.feedback.link_url.focus();
           return false;
	}
	
  if (document.feedback.our_link.value.length < 1)
  	{
	 	   alert("Please enter the URL location of our link on your web page/blog.");
		   document.feedback.our_link.focus();
           return false;
	}

  if (document.feedback.category.value.length < 1)
  	{
	 	   alert("Please select the category you want to be included in.\nIf no category matches, please select 'Other' and we shall try and create a new category for you.");
		   document.feedback.category.focus();
           return false;
	}

  if (document.feedback.description.value.length < 1)
  	{
	 	   alert("Please enter a description.");
		   document.feedback.description.focus();
           return false;
	}
 
// default (ok)
	return true;
}