function checkform(form)

{

  if (form.Name.value == "") 

  {

    alert( "Please enter your Name." );

    form.Name.focus();

    return false ;

  } 



  if(form.Email.value=="")

  {

  	alert("Please enter your E-mail address.");

  	form.Email.focus();

  	return false;

  }
  
   if(form.Phone.value=="")

  {

  	alert("Please enter your Telephone.");

  	form.Phone.focus();

  	return false;

  }


  if(form.Email.value!="")

  {

   var txtval;       

   txtval=form.Email.value;

    var regExEmail=/^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$/; 

    if(!(regExEmail.test(txtval)))

    {

       alert("Please Enter valid Email");

       form.Email.focus();

       return false; 

    }

  }

   return true ;

}