displaying an image in a template

I have a view file that is being loaded with this:

$this->output->set_template('default3');

inside default3 I have this bit of code.

<?php
if ($_GET['typo']=="PHARMA"){
      echo '<script type="text/JavaScript">
      <img src="<?php echo base_url(); ?>assets/themes/default/images/new_blue_logo_sub240x240.png" style="float:left;margin-top:5px;z-index:5" alt="logo"/>
      </script>;
    }

if ($_GET['typo']=="SOFTWARE"){         <<this line is causing the error
      echo '<script type="text/JavaScript">
      <img src="<?php echo base_url(); ?>assets/themes/default/images/output-onlinepngtools (8).png" style="float:left;margin-top:5px;z-index:5" alt="logo"/>
      </script>;
    };
?>

I am trying to get either one of those two images to appear. But the second $_GET causes an error: 
Message: syntax error, unexpected 'typo' (T_STRING), expecting ',' or ';'
Why is this?

proof that an old dog can learn new tricks