var error_flag=false;



function check_field_em(id)
{
    var re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;



    var em=document.getElementById(id).value;


     if(!re.test(em))
    {
      document.getElementById(id).style.background="red";
      error_flag=true;
      }
    else
      document.getElementById(id).style.background="white";

}



function ValidForm(form)
{
  error_flag=false;


  check_field_em('email');



  if(error_flag==true)
  {
    alert("Please complete all the fields that are highlighted in red");
    error_flag=false;
  	return false;
	}

	return true;

}