Javascript: Using query string to filter list view in sharepoint.

Javascript: query string manager to filter list view in sharepoint

/*
object to save filters and apply to URL
*/
var QueryStringManager = function(window) {
    this.window = window;
  };

QueryStringManager.prototype = function() {
    var filters = [],
        viewFilters = [],
        multifilter = {"IsSet":false},

    url = function() {
        return this.window.location.protocol + "//" + this.window.location.host + this.window.location.pathname;
    },

    regexIndexOf = function(phrase, regex, startpos) {
        // thanks StackOverflow: http://stackoverflow.com/questions/273789/is-there-a-version-of-javascripts-string-indexof-that-allows-for-regular-expr 
        var indexOf = phrase.substring(startpos || 0).search(regex);
        return (indexOf >= 0) ? (indexOf + (startpos || 0)) : indexOf;
    },

    getExistingFilter = function(filterName) {
        var urlSearch = this.window.location.search;
       
        var queryStrings = {}; 
        urlSearch.replace( new RegExp("([^?=&]+)(=([^&]*))?", "g"), function($0, $1, $2, $3) { queryStrings[$1] = $3; } ); 

        return queryStrings; 

    },

    attachFilter = function(fieldName, fieldValue) {
        if ((fieldValue !== -1) && (fieldValue !== -2)) {
            filters.push( {"FilterField":fieldName, "FilterValue":fieldValue} );
        }
        return this;    
    },

    attachMultiFilter = function(fieldName, fieldValues) {
        multifilter = $.extend(multifilter, { "IsSet":true, "FilterField": fieldName, "FilterValues": fieldValues });
        return this;    
    },

    applyFilter = function() {
        var furl = url() + "?";

        for(var i=0;i<viewFilters.length;i++)
        {
            furl = furl + "View=" + viewFilters[i].View + "&";
        }

        if (multifilter.IsSet) {
            furl = furl + "FilterName=" + multifilter.FilterField + "&FilterMultiValue=" + multifilter.FilterValues + "&";
        }

        for (var i = 0; i<filters.length; i++) {
            furl = furl + "FilterField" + (i + 1) + "=" + filters[i].FilterField + "&FilterValue" + (i + 1) + "=" + filters[i].FilterValue + "&";
        }

        this.window.location = furl;
    },

    clearFilters = function() {
        filters = [];
        multifilter = {"IsSet":false};
        return this;    
    };


    return {    getExistingFilter : getExistingFilter,
                attachFilter : attachFilter,
                applyFilter : applyFilter,
                attachMultiFilter : attachMultiFilter,
                clearFilters : clearFilters,
                attachViewFilter : attachViewFilter
            };

}();

« attachViewFilter » is undefined