Javascript JQuery更改下拉列表项

所以我有一段相当复杂的代码，是以前的程序员为我写的；但是，它现在在控制台中显示错误，并阻止其他jquery脚本在页面上运行。我并不真正关心控制台错误，但它阻止了一个模式框弹出供用户登录，同时阻止了fancybox lightbox

要查看问题的实时版本，您可以转到：

代码的目标是使下拉列表根据先前选择的下拉列表自动填充。例如，在左上角的搜索列表中使用前面提到的url，如果有人选择了美国，则会有该国家的州列表。然后，如果用户在中选择一个州，将在下面的选择框中显示该州的城市列表。这一部分工作得很好，除了它不断抛出控制台代码UncaughtReferenceError:request没有定义，并且阻塞了其他jquery模式框和lightbox。我相信我已经将问题缩小到一个页面上的javascript，它会自动填充下拉选择，如果此人在特定页面上。例如，如果用户在科罗拉多州的页面上，则国家的选择框将是美国，州的选择框将是科罗拉多州。所有这些都做了它应该做的事情，但是它阻止了其他jquery脚本的运行。代码如下：

Javascript-Ajax

这是search.php

下面是javascript页面，控制台指出错误来自该页面：

最后是搜索小部件：

两天多来，我一直在绞尽脑汁，想弄清楚到底是怎么回事，我真的希望这是件容易的事。如果你们能帮我解决这个问题，你们会成为救命恩人的

谢谢，

---

Chris

您的问题似乎是范围中没有定义请求。只需将其更改为范围内的连接即可解决您的问题。

此时我的想法非常混乱，因此我非常感谢您的帮助。我如何定义范围？我已经尝试在前面添加var，但我一定是做错了什么。我必须访问完整的代码才能更好地为您提供建议，老实说，这是一个我今晚真的不想去的天坑。您需要访问该函数中已声明的XMLHttpRequest。但是看代码，我真的不明白为什么request.send会出现。我可能遗漏了一些东西，但可能值得尝试一下快速移除它，看看会发生什么。

 <?php
  header('Content-Type: text/javascript; charset=UTF-8');
  // ...
?>


function sack(file) {
this.xmlhttp = null;
this.resetData = function () {
    this.method = "POST";
    this.queryStringSeparator = "?";
    this.argumentSeparator = "&";
    this.URLString = "";
    this.encodeURIString = true;
    this.execute = false;
    this.element = null;
    this.elementObj = null;
    this.requestFile = file;
    this.vars = new Object();
    this.responseStatus = new Array(2);
};
this.resetFunctions = function () {
    this.onLoading = function () {};
    this.onLoaded = function () {};
    this.onInteractive = function () {};
    this.onCompletion = function () {};
    this.onError = function () {};
    this.onFail = function () {};
};
this.reset = function () {
    this.resetFunctions();
    this.resetData();
};
this.createAJAX = function () {
    try {
        this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e1) {
        try {
            this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e2) {
            this.xmlhttp = null;
        }
    }
    if (!this.xmlhttp) {
        if (typeof XMLHttpRequest != "undefined") {
            this.xmlhttp = new XMLHttpRequest();
        } else {
            this.failed = true;
        }
    }
};
this.setVar = function (name, value) {
    this.vars[name] = Array(value, false);
};
this.encVar = function (name, value, returnvars) {
    if (true == returnvars) {
        return Array(encodeURIComponent(name), encodeURIComponent(value));
    } else {
        this.vars[encodeURIComponent(name)] =     Array(encodeURIComponent(value), true);
    }
}
this.processURLString = function (string, encode) {
    encoded = encodeURIComponent(this.argumentSeparator);
    regexp = new RegExp(this.argumentSeparator + "|" + encoded);
    varArray = string.split(regexp);
    for (i = 0; i < varArray.length; i++) {
        urlVars = varArray[i].split("=");
        if (true == encode) {
            this.encVar(urlVars[0], urlVars[1]);
        } else {
            this.setVar(urlVars[0], urlVars[1]);
        }
    }
}
this.createURLString = function (urlstring) {
    if (this.encodeURIString && this.URLString.length) {
        this.processURLString(this.URLString, true);
    }
    if (urlstring) {
        if (this.URLString.length) {
            this.URLString += this.argumentSeparator + urlstring;
        } else {
            this.URLString = urlstring;
        }
    }
    this.setVar("rndval", new Date().getTime());
    urlstringtemp = new Array();
    for (key in this.vars) {
        if (false == this.vars[key][1] && true == this.encodeURIString) {
            encoded = this.encVar(key, this.vars[key][0], true);
            delete this.vars[key];
            this.vars[encoded[0]] = Array(encoded[1], true);
            key = encoded[0];
        }
        urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];
    }
    if (urlstring) {
        this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);
    } else {
        this.URLString += urlstringtemp.join(this.argumentSeparator);
    }
}
this.runResponse = function () {
    eval(this.response);
}
this.runAJAX = function (urlstring) {
    if (this.failed) {
        this.onFail();
    } else {
        this.createURLString(urlstring);
        if (this.element) {
            this.elementObj = document.getElementById(this.element);
        }
        if (this.xmlhttp) {
            var self = this;
            if (this.method == "GET") {
                totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
                this.xmlhttp.open(this.method, totalurlstring, true);
            } else {
                this.xmlhttp.open(this.method, this.requestFile, true);
                try {
                    this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
                } catch (e) {}
            }
            this.xmlhttp.onreadystatechange = function () {
                switch (self.xmlhttp.readyState) {
                    case 1:
                        self.onLoading();
                        break;
                    case 2:
                        self.onLoaded();
                        break;
                    case 3:
                        self.onInteractive();
                        break;
                    case 4:
                        self.response = self.xmlhttp.responseText;
                        self.responseXML = self.xmlhttp.responseXML;
                        self.responseStatus[0] = self.xmlhttp.status;
                        self.responseStatus[1] = self.xmlhttp.statusText;
                        if (self.execute) {
                            self.runResponse();
                        }
                        if (self.elementObj) {
                            elemNodeName = self.elementObj.nodeName;
                            elemNodeName.toLowerCase();
                            if (elemNodeName == "input" || elemNodeName == "select" || elemNodeName == "option" || elemNodeName == "textarea") {
                                self.elementObj.value = self.response;
                            } else {
                                self.elementObj.innerHTML = self.response;
                            }
                        }
                        if (self.responseStatus[0] == "200") {
                            self.onCompletion();
                        } else {
                            self.onError();
                        }
                        self.URLString = "";
                        break;
                }
            };
            this.xmlhttp.send(this.URLString);
        }
    }
};
this.reset();
this.createAJAX();
}
var ajax = new Array();

function getFSREPlist(sel, elementidupdate, fsrepvariable, currentvalue) {
if (sel == '[object]' || sel == '[object HTMLSelectElement]') {
    var FSREPID = sel.options[sel.selectedIndex].value;
} else {
    var FSREPID = sel;
}
document.getElementById(elementidupdate).options.length = 0;
var index = ajax.length;
ajax[index] = new sack();
ajax[index].requestFile = 'http://www.cabcot.com/wp-content/plugins/firestorm-real-estate-plugin/search.php?' + fsrepvariable + '=' + FSREPID + '&cvalue=' + currentvalue;
ajax[index].onCompletion = function () {
    ElementUpdate(index, elementidupdate)
};
ajax[index].runAJAX();
}

function ElementUpdate(index, elementidupdate) {
    var obj = document.getElementById(elementidupdate);
    eval(ajax[index].response);
}

<?php
require("../../../wp-config.php"); 

if(isset($_GET['ProvinceID'])){
    $FSREPCities = $wpdb->get_results("SELECT * FROM ".$wpdb->prefix."fsrep_cities WHERE province_id = ".$_GET['ProvinceID']." ORDER BY city_name");
    $FSREPProvince = $wpdb->get_row("SELECT * FROM ".$wpdb->prefix."fsrep_provinces WHERE province_id = ".$_GET['ProvinceID']);
    $HTTPREFERER = explode('?', $_SERVER['HTTP_REFERER']);
    if (substr($HTTPREFERER[0], -13) == '/add-listing/') {
        echo "obj.options[obj.options.length] = new Option('Select a City','');\n";
    } else {
        echo "obj.options[obj.options.length] = new Option('Search All of ".$FSREPProvince->province_name."','');\n";
    }
    $count = 1;
    foreach ($FSREPCities as $FSREPCities) {
        echo "obj.options[obj.options.length] = new Option('".$FSREPCities->city_name."','".$FSREPCities->city_id."');\n";
        if ($FSREPCities->city_id == $_GET['cvalue']) {
            echo "obj.options[$count].selected = true;";
        }
        $count++;
    }
}
if(isset($_GET['CountryID'])){
    $FSREPProvinces = $wpdb->get_results("SELECT * FROM ".$wpdb->prefix."fsrep_provinces WHERE country_id = ".$_GET['CountryID']." ORDER BY province_name");
    $FSREPCountry = $wpdb->get_row("SELECT * FROM ".$wpdb->prefix."fsrep_countries WHERE country_id = ".$_GET['CountryID']);
    $count = 1;
    echo "obj.options[obj.options.length] = new Option('Select a State/Province','');\n";
    foreach ($FSREPProvinces as $FSREPProvinces) {
        echo "obj.options[obj.options.length] = new Option('".$FSREPProvinces->province_name."','".$FSREPProvinces->province_id."');\n";
        if ($FSREPProvinces->province_id == $_GET['cvalue']) {
            echo "obj.options[$count].selected = true;";
        }
        $count++;
    }
}


?>

<script type="text/javascript">
    <?php
            if (isset($_POST['fsrep-search-country']) && isset($_POST['fsrep-search-province'])) {
                echo 'jQuery(document).ready(function ($){getFSREPlist(\''.$_POST['fsrep-search-country'].'\', \'fsrep-search-province\', \'CountryID\', \''.$_POST['fsrep-search-province'].'\'); getFSREPlist(\''.$_POST['fsrep-search-province'].'\', \'fsrep-search-city\', \'ProvinceID\', \''.$_POST['fsrep-search-city'].'\'); request.send(null); });';
            }else {
                if ($CountryID != 0) {
                    $GetCountry = $CountryID;
                    if ($ProvinceID != 0) {
                        $GetProvince = $ProvinceID;
                    }
                    if ($CityID != 0) {
                        $GetCity = $CityID;
                    }

                    echo 'jQuery(document).ready(function ($){getFSREPlist(\''.$GetCountry.'\', \'fsrep-search-province\', \'CountryID\', \''.$GetProvince.'\'); getFSREPlist(\''.$GetProvince.'\', \'fsrep-search-city\', \'ProvinceID\', \''.$GetCity.'\'); request.send(null); });';
                }
            }   
            ?>
    </script> 

<?php  
function fsrep_search_widget_init() {
    if ( !function_exists('register_sidebar_widget') || !function_exists('register_widget_control') ) {
        return;
    }
    function fsrep_search_widget($args) {
        global $wpdb,$FSREPconfig,$CityID,$ProvinceID,$CountryID;
        extract($args);
        $options = get_option('fsrep_search_widget');
        $fsrep_title = empty($options['title']) ? 'Search Listings' : $options['title'];
        echo $before_widget;
        echo $before_title;
        echo $fsrep_title;
        echo $after_title;
        echo '<form id="fsrep_search_widget_form" name="fsrep_search_widget_form" action="'.get_option('home').'/listings/search/" method="post">';
        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">Country:</div>';
        echo '<select id="fsrep-search-country" name="fsrep-search-country"  onchange="getFSREPlist(this, \'fsrep-search-province\', \'CountryID\', \'\')">';
        echo '<option value="">Select Country</option>';
        $FSREPCountries = $wpdb->get_results("SELECT * FROM ".$wpdb->prefix."fsrep_countries ORDER BY country_name");
        foreach ($FSREPCountries as $FSREPCountries) {
            if ($wpdb->get_var("SELECT listing_address_country FROM ".$wpdb->prefix."fsrep_listings WHERE listing_address_country = ".$FSREPCountries->country_id) > 0) {
                $selected = '';
                if (isset($_POST['fsrep-search-country']) || $CountryID != 0) { 
                    if ($_POST['fsrep-search-country'] == $FSREPCountries->country_id) { 
                        $selected = ' selected'; 
                    }elseif ($CountryID == $FSREPCountries->country_id) { 
                        $selected = ' selected'; 
                    }
                }
                echo '<option value="'.$FSREPCountries->country_id.'"'.$selected.'>'.$FSREPCountries->country_name.'</option>';
            }
        }
        echo '</select></div>';
        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">State/Prov.:</div>';
        echo '<select id="fsrep-search-province" name="fsrep-search-province"  onchange="getFSREPlist(this, \'fsrep-search-city\', \'ProvinceID\', \'\')">';
        echo '<option value="">- - - - - -</option>';
        echo '</select></div>';
        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">City:</div>';
        echo '<select id="fsrep-search-city" name="fsrep-search-city">';
        echo '<option value="">- - - - - -</option>';
        echo '</select></div>';
        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">Price:</div>';
        echo '<select name="fsrep-search-price-range">';
        echo fsrep_price_range_print('options',$_POST['fsrep-search-price-range']);
        echo '</select></div>';
        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">to</div>';
        echo '<select name="fsrep-search-price-range2">';
        echo fsrep_price_range_print('options',$_POST['fsrep-search-price-range2']);
        echo '</select></div>';
        $SFields = $wpdb->get_results("SELECT * FROM ".$wpdb->prefix."fsrep_fields WHERE field_search = 1 ORDER BY field_order");
        foreach($SFields as $SFields) {
            $SFieldsValue = '';
            echo '<div class="fsrepws-input"><div class="fsrepws-input-title fsrepwst-'.$SFields->field_id.'">'.$SFields->field_name.'</div>';
            if ($SFields->field_type == 'selectbox') {
                echo '<select name="field-'.$SFields->field_id.'">';
                echo '<option value="">All</option>';
                $Array = explode(',',$SFields->field_value);
                for($i=0;$i<count($Array);$i++) {
                    $selected = '';
                    if (isset($_POST['field-'.$SFields->field_id])) { if ($_POST['field-'.$SFields->field_id] == $Array[$i]) { $selected = ' selected'; } }
                    echo '<option value="'.$Array[$i].'"'.$selected.'>'.$Array[$i].'</option>';
                }
                echo '</select></div>';
            } elseif ($SFields->field_type == 'radio') {
                $selected = ''; if (!isset($_POST['field-'.$SFields->field_id])) { $selected = ' checked'; }
                echo '<br /><label for="wsall"><input type="radio" style="width: 10px;" name="field-'.$SFields->field_id.'" value="" id="wsall"'.$selected.'> All</label>';
                $Array = explode(',',$SFields->field_value);
                for($i=0;$i<count($Array);$i++) {
                    $selected = '';
                    if (isset($_POST['field-'.$SFields->field_id])) { if ($_POST['field-'.$SFields->field_id] == $Array[$i]) { $selected = ' checked'; } }
                    echo '<label for="'.$Array[$i].'"><input type="radio" style="width: 10px;" name="field-'.$SFields->field_id.'" value="'.$Array[$i].'" id="'.$Array[$i].'" '.$selected.'> '.$Array[$i].'</label>';
                }
                echo '</select></div>';
            } elseif ($SFields->field_type == 'checkbox') {
                $selected = ''; if (!isset($_POST['field-'.$SFields->field_id])) { $selected = ' checked'; }
                echo '<br /><input type="checkbox" style="width: 25px;" name="field-'.$SFields->field_id.'" value="" '.$selected.' /> All &nbsp; &nbsp;<br />';
                $Array = explode(',',$SFields->field_value);
                for($i=0;$i<count($Array);$i++) {
                    $selected = '';
                    if (isset($_POST['field-'.$SFields->field_id])) { if ($_POST['field-'.$SFields->field_id] == $Array[$i]) { $selected = ' checked'; } }
                    echo '<input type="checkbox" style="width: 25px;" name="field-'.$SFields->field_id.'-'.$i.'" value="'.$Array[$i].'" '.$selected.' /> '.$Array[$i].' &nbsp; &nbsp;<br />';
                }
                echo '</select></div>';
            } else {
                if (isset($_POST['field-'.$SFields->field_id])) { $SFieldsValue = $_POST['field-'.$SFields->field_id]; }
                echo '<input type="text" name="field-'.$SFields->field_id.'" id="field-'.$SFields->field_id.'" value="'.$SFieldsValue.'" />';
            }
        }


        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">Bedrooms:</div>';
        echo '<select name="fsrep-search-bedrooms">';
        echo '<option value="">All</option>';
                $Array = explode(',',$SFields->field_value);
                for($i=0;$i<10;$i++) {
                    $selectedbed = '';
                    if (isset($_POST['fsrep-search-bedrooms'])) { if ($_POST['fsrep-search-bedrooms'] == $i && $_POST['fsrep-search-bedrooms'] != '') { $selectedbed = ' selected'; } }
                    echo '<option value="'.$i.'"'.$selectedbed.'>'.$i.'+</option>';
                }
                echo '</select></div>';

        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">Bathrooms:</div>';
        echo '<select name="fsrep-search-bathrooms">';
        echo '<option value="">All</option>';
                $Array = explode(',',$SFields->field_value);
                for($i=0;$i<7.5;$i += 0.5) {
                    $selectedbath = '';
                    if (isset($_POST['fsrep-search-bathrooms'])) { if ($_POST['fsrep-search-bathrooms'] == $i && $_POST['fsrep-search-bathrooms'] != '') { $selectedbath = ' selected'; } }
                    echo '<option value="'.$i.'"'.$selectedbath.'>'.$i.'+</option>';
                }
                echo '</select></div>';

        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">Sqft:</div>';
        echo '<select name="fsrep-search-sqft">';
        echo '<option value="">All</option>';
                $Array = explode(',',$SFields->field_value);
                for($i=250;$i<5000;$i += 250) {
                    $selectedsqft = '';
                    if (isset($_POST['fsrep-search-sqft'])) { if ($_POST['fsrep-search-sqft'] == $i && $_POST['fsrep-search-sqft'] != '') { $selectedsqft = ' selected'; } }
                    echo '<option value="'.$i.'"'.$selectedsqft.'>'.$i.'+</option>';
                }
                echo '</select></div>';

        if (isset($_POST['fsrep-search-id'])) { $SFieldsValue = $_POST['fsrep-search-id']; }
        echo '<div class="fsrepws-input"><div class="fsrepws-input-title">Listing#</div><input type="text" name="fsrep-search-id" id="fsrep-search-id" value="'.$SFieldsValue.'" /></div>';


        //echo '<div class="fsrepws-input"><div class="fsrepws-input-title">Listing#</div><input type="text" name="fsrep-search-id" id="fsrep-search-id" value=""></div>';
        echo '<div id="fsrepws-submit"><input type="submit" name="fsrep-search-submit" id="fsrepw-widget-search-submit" value="Search" style="width:127px;font-size:14px" /></div>';




        echo '</form>';
        if ($FSREPconfig['EnableAdvancedSearch'] == 'Yes') {
            echo '<div align="center"><a href="'.get_option('home').'/listings/search/">Advanced Search</a></div>';
        }

        echo $after_widget;
    }
    function fsrep_search_widget_control() {
        $options = get_option('fsrep_search_widget');
        $fsrep_title = htmlspecialchars($options['title'], ENT_QUOTES);
        echo '<div>There are no options for this widget.</div>';
    }
    register_sidebar_widget('FSREP Search Widget', 'fsrep_search_widget');
    register_widget_control('FSREP Search Widget', 'fsrep_search_widget_control');
}
add_action('plugins_loaded', 'fsrep_search_widget_init');
?>