function switchCardType(imgPath){

  ccType = document.getElementById('WebContent_CC_Type').value;

  switch(ccType){

    default:
      document.getElementById('WebContent_CC_ID').maxLength = 16;
      document.getElementById('WebContent_CC_Verify').maxLength = 3;
      break;

    case 'American Express':
      document.getElementById('WebContent_CC_ID').maxLength = 15;
      document.getElementById('WebContent_CC_Verify').maxLength = 4;
      break;
  }

  document.getElementById('WebContent_CC_Image').src = imgPath + ccType + '.jpg';
}