function checkmail()
{
     if(document.newsletter.email.value == "")
      {
       alert("Please enter a valid email address!");
       document.newsletter.email.focus();
	   return false;
	  } 
	if(document.newsletter.email.value.indexOf('@') == -1) 
	{
       alert("Please enter a valid email address!");
   		document.newsletter.email.focus();
	   	return false;
    }

     if(document.newsletter.email.value.length < 5)
      {
       alert("Please enter a valid email address!");
       document.newsletter.email.focus();
	   return false;
	  } 


}