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  1. #1
    SitePoint Member Alterscape's Avatar
    Join Date
    Nov 2003
    NY, USA
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    xAddEventListener and fxns w/Arguments

    Okay, let's say I want to use xAddEventListener to trigger onButtonMouseOver(whichButton), a function which accepts an integer to tell it which button has been mouseovered (so that the proper info can be retrieved from an array). If I use the line

    HTML Code:
    xAddEventListener('leftmenu00_sensor', 'mouseover',buttonMouseOver(0),false);
    it won't work at all. However

    HTML Code:
    xAddEventListener('leftmenu00_sensor', 'mouseover',buttonMouseOver,false);
    works fine, so long as I hardcode that leftmenu_00 is being moused over in the buttonMouseOver function.

    Since I really don't want to write a different function for every button on my page, I'd really like to know how to pull this off.

  2. #2
    I'll take mine raw silver trophy MikeFoster's Avatar
    Join Date
    Dec 2002
    Alabama, USA
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    Hi Alterscape,

    This might not be the best solution for you since I'm not sure what else you're doing. But it should give you some ideas:
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    <html xmlns="">
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
    <title>xAddEventListener Demo</title>
    <script type='text/javascript' src='x.js'></script>
    <script type='text/javascript'>
    var veggies = new Array('Corn', 'Peas', 'Beans', 'Squash', 'Potatoes', 'Tomatoes');
    window.onload = function() {
      var b;
      for (var i = 0; i < veggies.length; ++i) {
        b = xGetElementById('btn' + i);
        b.veggieIndex = i;
        xAddEventListener('btn' + i, 'mouseover', btnOnMouseover, false);
    function btnOnMouseover(evnt)
      var e = new xEvent(evnt);
      var b =;
      if (typeof(b.veggieIndex) != 'undefined') {
        var t = xGetElementById('txt0');
        t.value = veggies[b.veggieIndex];
    <p><input id='btn0' type='button' value='Corn' /></p>
    <p><input id='btn1' type='button' value='Peas' /></p>
    <p><input id='btn2' type='button' value='Beans' /></p>
    <p><input id='btn3' type='button' value='Squash' /></p>
    <p><input id='btn4' type='button' value='Potatoes' /></p>
    <p><input id='btn5' type='button' value='Tomatoes' /></p>
    <p><input id='txt0' type='text' value='' /></p>


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