//Constructor

function SearchSuggest(){

}

var searchArray = new Array(6);

var arrayLimit = 6;

var usercallback;

SearchSuggest.prototype.loadYahoo = function(query){

    var yUrl = "http://search.yahooapis.com/WebSearchService/V1/relatedSuggestion?";

    var yAppId = "appid=rv9RNS3V34GEz5NvGPBClnQaRVtN1tO57Di0OxX24nfHx1iqNA_QfahxpBoJJw--";

    var yOutput = "&output=json";

    var yResults = "&results = 5";

    var yCallBack = "&callback=SearchSuggest.prototype.processYahoo&query=";

    var yahooSuggest = yUrl + yAppId + yOutput + yCallBack + query;

    var headID = document.getElementsByTagName("head")[0];         

    var newScript = document.createElement('script');

    newScript.type = 'text/javascript';

    newScript.src = yahooSuggest;

    headID.appendChild(newScript);

}

SearchSuggest.prototype.processYahoo = function(resultObject){

    searchArray = [];

    if(resultObject.ResultSet && resultObject.ResultSet.Result){

        var n = arrayLimit < resultObject.ResultSet.Result.length ? arrayLimit : resultObject.ResultSet.Result.length;

        for(var i=0; i<n; i++) {

            searchArray[i] = resultObject.ResultSet.Result[i];

        }

    }

    usercallback(searchArray);

}

SearchSuggest.prototype.loadGoogle = function(query){

    var gUrl = "http://suggestqueries.google.com/complete/search?hl=en&json=t&jsonp=";

    var gCallBack = "SearchSuggest.prototype.processGoogle&q=";

    var googleSuggest = gUrl + gCallBack + query;

    var headID = document.getElementsByTagName("head")[0];         

    var newScript = document.createElement('script');

    newScript.type = 'text/javascript';

    newScript.src = googleSuggest;

    headID.appendChild(newScript);

}

SearchSuggest.prototype.processGoogle = function(resultObject){

    searchArray = [];

    if(resultObject){

        var n = arrayLimit < resultObject[1].length ? arrayLimit : resultObject[1].length;

        searchArray[0] = resultObject[0];

        for(var i=1; i<n; i++) {

            searchArray[i] = resultObject[1][i];

        }

    }

    usercallback(searchArray);

}

SearchSuggest.prototype.searchSuggest = function(queryString, getSearchUrl){

    //load yahoo suggest database. this has a limit of 5k hits/day per ip address.

    //this.loadYahoo(queryString);

    //load google suggest database

    this.loadGoogle(queryString);

    usercallback = getSearchUrl;

}