Ik heb onderstaand script. Hier zit een knop in maar die wil ik na bijv. 20 seconden automatisch laten uitvoeren. Kan iemand mij vertellen welke tekst/script ik moet toevoegen om dit werkend te krijgen?
HTML:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
"http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<head>
<title>Changing table content dynamically with DOM methods</title>
<meta http-equiv="refresh" content="10" >
</head>
<body>
<script type="text/javascript">
function changeContent(frm)
{
if (! document.getElementById)
{
alert("Sorry, your browser doesn't support this.");
return;
}
/* check to make sure we have everything we need. */
var R = frm.elements["row"].value;
var C = frm.elements["col"].value;
var newVal = frm.elements["newVal"].value;
if (!R || isNaN(R))
{
alert("Row must be a number.");
return;
}
if (!C || isNaN(C))
{
alert("Column must be a number.");
return;
}
if (! newVal || newVal == "")
{
alert("You forgot to give a new value.");
return;
}
/* row and column indexes are 0 based, so subtract one from the
logical values of 1-4 to make it 0-3 */
R--;
C--;
/* for this example, we are using just plain text in the table cells
- this gets a little more complicated if other things are in the table
cells or if the text length is long enough to span multiple nodes */
var row = document.getElementById("tb").getElementsByTagName ("tr")
[R];
var cell = row.getElementsByTagName("td")[C];
var newCell = document.createElement("td");
row.replaceChild(newCell, cell);
newCell.appendChild(document.createTextNode(newVal ));
return;
}
</script>
<p>A 4 by 4 table...</p>
<table id="t1" border="1" cellpadding="5" cellspacing="0">
<tbody id="tb">
<tr>
<td><p>R1 C1</p></td>
<td><p>R1 C2</p></td>
<td><p>R1 C3</p></td>
<td><p>R1 C4</p></td>
</tr>
<tr>
<td><p>R2 C1</p></td>
<td><p>R2 C2</p></td>
<td><p>R2 C3</p></td>
<td><p>R2 C4</p></td>
</tr>
<tr>
<td><p>R3 C1</p></td>
<td><p>R3 C2</p></td>
<td><p>R3 C3</p></td>
<td><p>R3 C4</p></td>
</tr>
<tr>
<td><p>R4 C1</p></td>
<td><p>R4 C2</p></td>
<td><p>R4 C3</p></td>
<td><p>R4 C4</p></td>
</tr>
</tbody>
</table>
<form id="f1" name="f1">
<p>Replace which cell?</p>
<p>
Row (1-4): <input type="text" name="row" size="3" value=""><br>
Column (1-4): <input type="text" name="col" size="3" value="">
</p>
<p>New value: <input type="text" name="newVal"></p>
<input type="button" name="b1" value="Try It" onClick="changeContent
(this.form)">
</form>
</body>
</html>
Laatst bewerkt door een moderator:
