text: function validateemail()  
  {  
  var x=document.myform.email.value;  
  var atposition=x.indexOf("@");  
  var dotposition=x.lastIndexOf(".");  
  if (atposition<1 || dotposition<atposition+2 || dotposition+2>=x.length){  
    alert("Please enter a valid e-mail address");  
    return false;  
    }  
  }
  