var id = null;
function w_open(a)
  {
   id=window.open(a,"cat","width=700,height=540,scrollbars,toolbar, resizable=yes");
   id.focus();
  }
//check for email address: look for [@] amd [.]
function isEmail(elm)
{
       if (elm.value.indexOf("@") != "-1" &&
             elm.value.indexOf(".") != "-1" &&
			 elm.value != "")
       return true;
       else return false;
}
//check form
function checkInfo(form)
{
       if (!isEmail(form.email))
       {
             alert("Адрес электронной почты заполнен некорректно!");
              form.email.focus();
             return false;
       }
       return true;
}