.textbox
{
   border:solid 1px #e0dddd;
   height:18px;   
   font-family:Arial;
  	color: #b1ca49;
    background-color:white;
    font-size:12px;
    font-weight:bold;
}

.textbox_invalid
{
   border: ridge 1px red;
   height:17px;    
   background-color:Red;
}