函数“未定义” [英] Function "is not defined"

问题描述

我有这段代码

 < script type =text / javascriptsrc =http：// www。 google.com/jsapi\"></script> 
< script type =text / javascript> 
 google.load（maps，3，{other_params：sensor = false}）; 
 google.load（jquery，1.3.2）; 
 google.load（visualization，1，{packages：[columnchart]}）; 
 
函数initialize（）{
 
 //一些动作... 
 
函数mapload（myfile）{
 jQuery.get trace_+ myfile +.xml，{}，函数（data）{
 //一些动作... 
}）; 
} 
 
 mapload（'ah'）; 
 
} 
 
 google.setOnLoadCallback（initialize）; 
< / script> 
 
< input type =buttonvalue =Hunt Mesaonclick =mapload（'hunt'）/> 
  

第一个mapload正常工作

但是onclick按钮会显示mapload没有定义。

你知道为什么么？

解决方案

mapload（）仅在 initialize（）中定义。当 onclick 处理程序尝试调用它时，它不再存在。为了解决你的问题，一个快速和肮脏的解决方案是用 window.mapload 替换所有出现的 mapload 。所以写

  window.mapload = function（myfile）{
 jQuery.get（trace_+ myfile + .xml，{}，函数（data）{
 //一些动作... 
}）; 
} 
  

和

 < input type =buttonvalue =Hunt Mesaonclick =window.mapload（'hunt'）/> 
  

I have this code

        <script type="text/javascript" src="http://www.google.com/jsapi"></script>
        <script type="text/javascript">
        google.load("maps", "3",  {other_params:"sensor=false"});
        google.load("jquery", "1.3.2");
        google.load("visualization", "1", {packages: ["columnchart"]});

        function initialize() {

            // some actions...

            function mapload(myfile) {
                    jQuery.get("trace_" + myfile + ".xml", {}, function(data) {
                        // some actions...
                    });
            }

            mapload('ah');

        }

        google.setOnLoadCallback(initialize);
        </script>

        <input type="button" value="Hunt Mesa" onclick="mapload('hunt')" />

The first "mapload" works fine

But the onclick button say "mapload is not defined".

Do you know why ?

解决方案

mapload() is only defined within initialize(). When your onclick handler tries to call it, it doesn't exist any more. To solve your problem, a quick&dirty solution is to replace all occurrences of mapload with window.mapload. So write

        window.mapload = function (myfile) {
                jQuery.get("trace_" + myfile + ".xml", {}, function(data) {
                    // some actions...
                });
        }

and

<input type="button" value="Hunt Mesa" onclick="window.mapload('hunt')" />

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