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JAVASCRIPT

  • (JS) Calculate price excluding VAT

    Sometimes you need to calculate the price of a product excluding VAT, and the only details you have is the amount including vat and the vat percent. This might be a bit tricky in some applications when there are mixed VAT percentages. For example, you payed 1000 space credits and in that sum there is…

  • (JS) Convert short color hex to pair

    If you have a three digit hex for a color. For example #FFF and want to convert it to a 6 digit number here’s a simple way:

  • (JS) Validate date in format YYYY-MM-DD

    A simple JS function to validate that a date string in the format YYYY-MM-DD is a valid date. Will validate that the day is correct for the given month, including leap years

  • (JS) Validate Swedish personnummer and organisationsnummer

    JavaScript functions for validating Swedish personal identity numbers (personnummer), and organisation numbers (organisationsnummer). The functions for personal identity number will also validate co-ordination number (samordningsnummer).

  • (JS) Use include method in IE

    Here’s a hack for using the includes method also in the horrible Internet Explorer. [js] if (!String.prototype.includes) { String.prototype.includes = function () { ‘use strict’; return String.prototype.indexOf.apply(this, arguments) !== -1; }; } [/js]

  • (JS) Newline to br

    Replaces newline characters with <br> tags in the same style as the php nl2br function

  • (JS) Super simple slider/carousel/slideshow

    Here’s how you can make a super simple slideshow that changes slides on a timer interval. You could easily edit it so any other event, like a mouse click, will trigger the slide() function. You can see it in action HERE HTML [html] <div class="slider"> <div class="slide red"> <p>THIS IS SLIDE 1</p> </div> <div class="slide…

  • (jQuery) Only allow number keyboard input

  • Hide elements with radio buttons

    Sometimes you want to show or hide certain elements of a form, depending on the selection of a radiobutton.   I am by no means any javascript ninja, but this is one simple way I came up with:  This could apply to any element. For example, you could put a whole bunch of elements in…

  • Hide elements with checkbox

    This is a slightly edited version of this post. Just to make it work with a checkbox instead of radio buttons.     [html] <html> <head> <script type="text/javascript"> function DisplayElement(checked) { if (checked) { document.getElementById(‘text’).style.display = ”; } else { document.getElementById(‘text’).style.display = ‘none’; } } </script> </head> <body> <form name="form"> <input type="checkbox" onclick="DisplayElement(this.checked)" checked/> <input…