Javascript 为什么查询只返回函数中不包含的数据

为什么这段代码能工作（只要它能在Chrome控制台中收回一个空的“CustomerObject”就行了

var CustomerObject = Parse.Object.extend("CustomerObject");
var retrieve = new Parse.Query(CustomerObject);  
retrieve.equalTo("customernumber", $('#searchnumber').val()); 
        retrieve.first({ 
            success: function(retrieveResults) 

        {

        }

    });
        var cname = retrieve.get("customername");  
        var cnumber = retrieve.get("customernumber"); 

但是，当用户单击搜索按钮时，函数中的代码不会返回任何“CustomerObject”

HTML

缺少括号

Find

  <input type="text" name="searchnumber" id="searchnumber" value="" placeholder="Customer Number"/>  
    <button type="submit" onclick = "search" >Find</button> 

function search() {
var CustomerObject = Parse.Object.extend("CustomerObject");
var retrieve = new Parse.Query(CustomerObject);  
retrieve.equalTo("customernumber", $('#searchnumber').val()); 
        retrieve.first({ 
            success: function(retrieveResults) 

        {

        }

    });
        var cname = retrieve.get("customername");  
        var cnumber = retrieve.get("customernumber"); 

  };