function checkform(){
    if (form1.name.value=="" || form1.email.value=="" ){
	 alert("Please,fill up required fields");
	 return false;
	}
	else {
     EmailAddr = document.form1.email.value;
     Filtro = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-]{2,})+\.)+([a-zA-Z0-9]{2,})+$/;
      if (Filtro.test(EmailAddr))
       return true;
      else{
      alert("Please,check the exactitude mail");
      /*document.form1.email.focus();
	  document.form1.email.focus();*/
      return false;
      }	 
    }
   }