function clear_box(hodnota){
		document.forms[0].email.value=hodnota;
}

function validate_reg(formular)
{
 
        if (formular.email.value=="")
        {
         alert("Musíte zadat email");
         formular.email.focus();
         return false;
        }
        else if (window.RegExp)
        {
         re = new RegExp("^[^@]+@[^.]+\..+$");
         if (!re.test(formular.email.value))
         {
          alert("Zadaný email není platný!");
          formular.email.focus();
          return false;
         }
        }
    else
          return true;
 }
 
function popup (href)
{

    puw = window.open (href, "puw", "toolbar=no,location=no,status=no,menubar=no,scrollbars=1,width=300,height=200,top=1,left=1");
    puw.focus();
    return false;

}