function validate(){
        if(document.newsLetterForm.email.value=="Enter Email Address")
    {
        alert("Please enter the Email address!");
        document.newsLetterForm.email.focus();
        return false;
    }
    if(document.newsLetterForm.email.value=="")
    {
        alert("Please enter the Email address!");
        document.newsLetterForm.email.focus();
        return false;
    }
    
    if(document.newsLetterForm.email.value!="")
    {
       if (document.newsLetterForm.email.value.indexOf("@")==-1 || document.newsLetterForm.email.value.indexOf(".")==-1 ) { 
       alert("The specified Email address seems to be invalid!")
          document.newsLetterForm.email.focus()
                   return false
                            }
    }
}