使用javasciprt自定义函数同样可以引用js文件

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function getJSM(f){var reg = /\/(\w+)\./;jF = f.match(reg);return jF[jF.length-1];}function loadJS(js){id = getJSM(js);var scriptId = document.getElementById(id);var head = document.getElementsByTagName('head').item(0);if(scriptId==null){script  = document.createElement('script');script.src = js;script.type = 'text/javascript';script.id = id;head.appendChild(script);}}//举例
<script type="text/javascript" charset="UTF-8">loadJS("../js/googleMap.js");loadJS("../js/51Map.js");</script>