如何将同一功能分为两部分？

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假设我具有以下结构，仅是一个示例：

   (function number1( $ ) {
                    $.fn.abcd = function( options ) {

                            heyyou.find(".123").css({});
                            heyyou.find(".456").css({});

 var delay = 1000;
 var site = "http://url";
 setTimeout(function(){   window.location.href = site; },delay);}
$("#button").on('click', function(){ window.location.href = site;});

                    return this;
                }( jQuery ));

我认为我需要做的是这样的：

//part1
(function number1( $ ) {
                    $.fn.abcd = function( options ) {

                            heyyou.find(".123").css({});
                            heyyou.find(".456").css({});

                    return this;
                }( jQuery ));
//part2
(function number1( $ ) {
                    $.fn.abcd = function( options ) {

 var delay = 1000;
 var site = "http://url";
 setTimeout(function(){   window.location.href = site; },delay);}
$("#button").on('click', function(){ window.location.href = site;});

                    return this;
                }( jQuery ));

What I'm trying to achieve here is: "part1" is going to be inside a js file that's going to be placed inside the header. "part2" is a function that I need to call from a <script></script> later on the DOM. The thing is that both parts are using the same main function, one is continuing the other.

例如：

<script src="part1.js"></script>

<body>

<script>//part2</script>
<button id="button">Do something</button>
</body>

So basically I want the function to start in the js file, then I'll finish it from another part. I'm not sure how to explain this, it's just that I need the var site to be called separately, as I'm going to use the same script for different pages, I need each page to call for the var site with a different value.

基本上，这是一个重定向脚本，因此我不能对每个页面使用相同的重定向URL。