在Javascript中返回一个字符串

@H_403_0@@H_301_1@我正在尝试创建一个简单的函数,在调用时将返回正确的字符串：

function getState(abbr){
   if (abbr=="WY")
   {
   return "Wyoming";
   }
}

然后电话是这样的：

var stateName = getState("WY");

然而,所有返回的是：0

对不起,如果我遗漏了明显的东西.

更新 – 我的原始概率是因为“&”这是我正在处理的真实代码：

function getState(abbr){
    var url = "states.asp"
    var state = ""; 
    $.get(url,function(data) {
        var i = 0;
        $.each($('state',data),function(index,el) {            
            if (abbr == ($(this).attr("abbr"))){
                //alert($(this).attr("abbr"));
                state = $(this).text();
            }//if (abbr == $(this).attr("abbr")){
        });//$.each($('state',el) {
    }).success(function() { 
        alert("x" + state);
        return state;
    }); //.success(function() { 
    //$.get(url,function(data) {
    alert("y" + state); 
    return state;
}

我的电话结果是“未定义”：

alert(getState("WY"));

警报(“x”状态)有效.

更新#2 —
这里是states.asp生成的所有内容(现在)…稍后它将返回公司等：

<?xml version="1.0" encoding="utf-8"?>
<STATELIST>
<STATE abbr="AL">Alabama</STATE>
<STATE abbr="AK">Alaska</STATE>
<STATE abbr="AZ">Arizona</STATE>
<STATE abbr="AR">Arkansas</STATE>
<STATE abbr="CA">California</STATE>
<STATE abbr="CO">Colorado</STATE>
<STATE abbr="CT">Connecticut</STATE>
<STATE abbr="DE">Delaware</STATE>
<STATE abbr="FL">Florida</STATE>
<STATE abbr="GA">Georgia</STATE>
<STATE abbr="HI">Hawaii</STATE>
<STATE abbr="ID">Idaho</STATE>
<STATE abbr="IL">Illinois</STATE>
<STATE abbr="IN">Indiana</STATE>
<STATE abbr="IA">Iowa</STATE>
<STATE abbr="KS">Kansas</STATE>
<STATE abbr="KY">Kentucky</STATE>
<STATE abbr="LA">Louisiana</STATE>
<STATE abbr="ME">Maine</STATE>
<STATE abbr="MD">Maryland</STATE>
<STATE abbr="MA">Massachusetts</STATE>
<STATE abbr="MI">Michigan</STATE>
<STATE abbr="MN">Minnesota</STATE>
<STATE abbr="MS">Mississippi</STATE>
<STATE abbr="MO">Missouri</STATE>
<STATE abbr="MT">Montana</STATE>
<STATE abbr="NE">Nebraska</STATE>
<STATE abbr="NV">Nevada</STATE>
<STATE abbr="NH">New Hampshire</STATE>
<STATE abbr="NJ">New Jersey</STATE>
<STATE abbr="NM">New Mexico</STATE>
<STATE abbr="NY">New York</STATE>
<STATE abbr="NC">North Carolina</STATE>
<STATE abbr="ND">North Dakota</STATE>
<STATE abbr="OH">Ohio</STATE>
<STATE abbr="OK">Oklahoma</STATE>
<STATE abbr="OR">Oregon</STATE>
<STATE abbr="PA">Pennsylvania</STATE>
<STATE abbr="RI">Rhode Island</STATE>
<STATE abbr="SC">South Carolina</STATE>
<STATE abbr="SD">South Dakota</STATE>
<STATE abbr="TN">Tennessee</STATE>
<STATE abbr="TX">Texas</STATE>
<STATE abbr="UT">Utah</STATE>
<STATE abbr="VT">Vermont</STATE>
<STATE abbr="VA">Virginia</STATE>
<STATE abbr="WA">Washington</STATE>
<STATE abbr="WV">West Virginia</STATE>
<STATE abbr="WI">Wisconsin</STATE>
<STATE abbr="WY">Wyoming</STATE>
</STATELIST>

var states = {};//cache of state names,with state abbreviations as keys function getState(abbr) { var dfrd = $.Deferred();//A deferred object,whose promise will be returned. if(!states[abbr]) { $.ajax({ url: "states.asp",dataType: 'XML',success: function(data) { //Load up the cache $.each($('state',function(i,el) { states[el.attr('abbr')] = $(el).text(); }); //Now resolve or reject the deferred object depending in whether states[abbr] has been cached if(states[abbr]) { dfrd.resolve(abbr,states[abbr]);//Success! Let's resolve the deferred object (and its promise). } else { dfrd.reject(abbr,'States successfully downloaded but ' + abbr + ' was not included'); } },error: function() { dfrd.reject(abbr,'Download of states Failed'); } }); } else { //The state name is already cached //The deferred object (and its promise) can be resolved without needing to make another ajax call. dfrd.resolve(abbr,states[abbr]); } return dfrd.promise(); }

在Javascript中返回一个字符串

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