Change background-color of a table on random with javascript
Question
I'm trying to attach a color-changing property to a table background.
var bakgrunnFarge=new Array("#CCFFCC", "#FFCCCC")
document.getElementById("change_color").style.background=bakgrunnFarge[Math.floor(Math.random()*bakgrunnFarge.length)]
<table class="change_color" name="change_color" id="change_color">
But I just can't get it to work, any help would be much appreciated. In advance, thank you
2 answers
solution1
2 ACCPTED 2013-10-28 19:43:42
You have to put your javascript UNDER your elements (your table):
<html>
<head>
<title>Random background-color</title>
</head>
<body>
<table class="change_color" name="change_color" id="change_color">
<tr>
<td>lorem</td>
<td>lorem</td>
<td>lorem</td>
<td>lorem</td>
</tr>
<tr>
<td>lorem</td>
<td>lorem</td>
<td>lorem</td>
<td>lorem</td>
</tr>
</table>
</body>
<script type="text/javascript">
var bakgrunnFarge=new Array("#CCFFCC", "#FFCCCC");
window.document.getElementById("change_color").style.background=bakgrunnFarge[Math.floor(Math.random()*bakgrunnFarge.length)]
</script>
</html>
solution2
2 2013-10-28 20:10:02
The DOM hasn't loaded yet. You can do something like this...
document.body.onload = function() {
var bakgrunnFarge=new Array("#CCFFCC", "#FFCCCC")
document.getElementById("change_color").style.background=bakgrunnFarge[Math.floor(Math.random()*bakgrunnFarge.length)]
}
Or place a handler in your body tag:
<body onload="myFunction()">Stuff</body>
Ooorr you can listen to the event DOMContentLoaded as so:
document.addEventListener("DOMContentLoaded", function(event) {
var bakgrunnFarge=new Array("#CCFFCC", "#FFCCCC")
document.getElementById("change_color").style.background=bakgrunnFarge[Math.floor(Math.random()*bakgrunnFarge.length)]
});
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