为什么这个Dojo代码不与它的“PHP文件”通信?-WhyisthisDojocodenotcommunicatingwithits'PHPfile?

In Firebug (with the FirePHP plugin) I noticed that there is no communication with the PHP file, and hence nothing happens...

Here is the Javascript:

在Firebug(使用FirePHP插件)中，我注意到与PHP文件没有通信，因此什么也没有发生……这是Javascript:

// three parameters are required by Dojo!
function buildMenu(type, data, evt)
{
    var menuDOM = document.getElementById("colorselect");
    var nextColor, nextItem;

    // delete previous items in the color menu
    menuDOM.options.length = null;

    // split the data into an array of colors
    var colors = data.split(', ');

    // go through the returned array of colors
    for(var i = 0; i 

Here is the PHP:

这是PHP:

 "black, yellow, green",
                    "medium" => "blue, purple, white, off-white, cream, bleached-white",
                    "small" => "orange, red, aqua, turqoise, aquamarine, light-blue");

    echo $colors[$shirtSize];
?>

...and here is the html:
(Dojo is linked to online here, and the Dojo io library is imported)

…这里是html: (Dojo链接到这里的在线，Dojo io库被导入)

    
        
        

        
       

       
       

       
       

    
    

       
            
                large shirt
            
            
                medium shirt
            
            
                small shirt
            
       

       

    

2 个解决方案

var deferred = dojo.xhrGet(
 {
    url: "shirtColors.php",
    content: {
      'size': size
    },
    handleAs: "text",
    load: buildMenu,
    error: function(error){
      //error handling code
    }
  }


);

function buildMenu (data)
{
//data contains the text string for the data returned by PHP
}