var styly=Array();

function FormValidate(form,field,rule,value)
{
  policko=document.getElementById(field);

  if (rule=='notEmpty') 
    {
      if (value=='') 
        {
          if ((styly[field]==undefined)) 
            {
              styly[field]=policko.style.borderColor;
            }
 
          policko.style.borderColor="#FF0000";
        }
      else 
        {
          policko.style.borderColor=styly[field];
        }
    }
    
  if (rule=='mail')
  {
    if (validateEmail(value)==true)
      {
        policko.style.borderColor=styly[field];
      }
    else
      { 
       policko.style.borderColor="#FF0000";
      }  
  
  }
    
}

    function validateEmail(email) {
           var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9\-\.])+\.([A-Za-z]{2,4})$/;
           if(reg.test(email) == false) {
                return false;
           }
           return true;
    }