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Editorial Team
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Asked: 2026-05-15T01:48:56+00:00

In general… How can I make a call on a function of an external

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In general… How can I make a call on a function of an external java script file?

More specific…

  • In the head tag i have

<script type="text/javascript" src="JScript/FontSize.js"></script>

  • The external javascript file, (that i would like to call) FontSize.js contains the following functions.

    function checkCookie()

function setCookie(c_name, value, expiredays)

function getCookie(c_name)

function increaseFontSize()

function decreaseFontSize()`

  • The FontSize.js is located at the ~/Jscript/ directory

I guess the body on load should contain something like

<body onload="/JScript/Fontsize.js/checkCookie()">

Of course nothing works as it should because, i do not know how to make the call to a function to an external js file

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1 Answer

  1. Editorial Team

    You just call it as if it were local 🙂

    <body onload="checkCookie()">

    Or, do it in script:

    window.onload = checkCookie;

    When you declare a function and it’s not in another object/namespace, it’s just globally available, and you can call it as if it immediately preceded your current code. By default these functions will be on the window object, you can see a short demo here.

    For example (doesn’t matter where this function’s defined, external or not):

    function myFunc() { alert('hi'); }
myFunc();
window.myFunc(); //same call, unless there's *another* myFunc in a local-er scope
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