Twitter Keyword Re-Direct

Twitter Keyword Re-Direct

Hi Guys,
I hope this is the right place to post this, im a bit of a noob.
Basically I have a twitter plugin that I have set to display one tweet. It works great, but what I would like to do is have my page re-direct if I tweet a specific keyword.
For example, if I tweet "Systems OK" then it re-directs to another address within a few seconds, but if I tweet "Systems Down" then the page stays put.
 
Any ideas how I would go about doing this?
 
Below is the plugin im using:
 
  1. <script type="text/javascript"> 
    $
    (document).ready(function(){ 
     $
    .getJSON('http://twitter.com/status/user_timeline/TWITTERACCOUNTNAME.json?count=5&callback=?', function(data){ 
      $
    .each(data, function(index, item){ 
       $
    ('#twitter').append('<div class="tweet"><p class="status">' + item.text.linkify() + '</p><p class="posted"><strong>' + relative_time(item.created_at) + '</strong></p></div>'); 
     
    }); 
      
     

    }); 
      
     

    function relative_time(time_value) { 
       
    var values = time_value.split(" "); 
       time_value
    = values[1] + " " + values[2] + ", " + values[5] + " " + values[3]; 
       
    var parsed_date = Date.parse(time_value); 
       
    var relative_to = (arguments.length > 1) ? arguments[1] : new Date(); 
       
    var delta = parseInt((relative_to.getTime() - parsed_date) / 1000); 
       delta
    = delta + (relative_to.getTimezoneOffset() * 60); 
        
       

    var r = ''; 
       
    if (delta < 60) { 
      r
    = 'a minute ago'; 
       
    } else if(delta < 120) { 
      r
    = 'couple of minutes ago'; 
       
    } else if(delta < (45*60)) { 
      r
    = (parseInt(delta / 60)).toString() + ' minutes ago'; 
       
    } else if(delta < (90*60)) { 
      r
    = 'an hour ago'; 
       
    } else if(delta < (24*60*60)) { 
      r
    = '' + (parseInt(delta / 3600)).toString() + ' hours ago'; 
       
    } else if(delta < (48*60*60)) { 
      r
    = '1 day ago'; 
       
    } else { 
      r
    = (parseInt(delta / 86400)).toString() + ' days ago'; 
       
    } 
        
       

    return r; 
     
    } 
      
     

    String.prototype.linkify = function() { 
     
    return this.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/, function(m) { 
       
    return m.link(m); 
     
    }); 
     
    }; 
    }); 
    </script>
    Thanks for your help, much appreciated!