function regKontrol(pattern, value) 
{ 
   r = new RegExp(pattern, "g"); 
   return r.test(value); 
} 
 
function formKontrol(form) 
{ 
     patternEposta   = "^"+"([abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0-9_\.\-]+)"+"@"+"([abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0-9_\.\-]+)"+"[\.]"+"([abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0-9_\.\-]+)"+"$"; 
           
     if ( !regKontrol(patternEposta,form.adres.value)) 
     { 
          alert("Lütfen Dogru Bir E-posta Adresi Giriniz."); 
          form.adres.value=""; 
          form.adres.focus(); 
          return false; 
     } 
     return true; 
}