Dictionary Lookup Mozilla Ubiquity Command

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/* This is Ali Rizvi's ubiquity first command */
CmdUtils.CreateCommand({ 
  name: "dictionary",
  // icon: "http://saaridev.wordpress.com",
  homepage: "http://saaridev.wordpress.com",
  author: { name: "Ali Rizvi", email: "@gmail.com"},
  license: "Ruby License",
  description: "Command to lookup a work on dictioanry.com",
  help: "dictionary <word-to-lookup>",
  takes: {"input": noun_arb_text},
  preview: function( pblock, input ) {
    searchText = jQuery.trim(input.text);
    if(searchText.length < 1) {
      pblock.innerHTML = "Searches for word on dictionary.com";
      return;
    }
    var previewTemplate = "Searches dictionary.com for <b>${query}</b>";
    var previewData = {query: searchText};
    pblock.innerHTML = CmdUtils.renderTemplate(previewTemplate, previewData);
  },
  execute: function(input) {
    var url = "http://dictionary.reference.com/browse/{QUERY}";
    var query = input.text ;
    var urlString = url.replace("{QUERY}", query);
    Utils.openUrlInBrowser(urlString);      
  }
});