code: function(codeText) {
  
        this.textarea = WireIt.cn('textarea', null, {width: "90%", height: "70px", border: "0", padding: "5px"}, codeText);
        this.setBody(this.textarea);
  
        YAHOO.util.Event.addListener(this.textarea, 'change', this.createTerminals, this, true);
        
     }
docs: Create the textarea for the javascript code
  @method buildTextArea
  @param {String} codeText