Why does the 'insertrow' work in this situation:
<html>
<script type="text/javascript">
function addRow(tableID) {
var tableRef = document.getElementById(tableID);
var newRow = tableRef.insertRow(2);
var newCell = newRow.insertCell(0);
var newText = document.createTextNode('New second cell')
newCell.appendChild(newText);
}
</script>
<table id="TableA">
<tr><td>firstcell</td><tr>
<tr><td>secondcell</td><tr>
<tr><td>thirdcell</td><tr>
</table>
<input type="button" value="try me" onclick="addRow('TableA');">
</html>
But not here (I didn't even bother to do the insertRow(2) here because
the domtable contains zero rows, I get 'index or size is negative or
greater than the nbr of rows') - just run the html below, please :
<html>
<head>
<script>
var arr=[];
arr[0]="first row";
arr[1]="second row";
arr[2]="third row";
arr[3]="fourth row";
function domtable() {
var myrow, mytd, mytext, mytable, attr;
mytable=document.createElement("table");
mytable.id='mijntabel';
for (i=0; i < arr.length ;i++){
myrow=document.createElement("tr");
mytd=document.createElement("td");
mytext=document.createTextNode(arr[i]);
mytd.appendChild(mytext);
myrow.appendChild(mytd);
mytable.appendChild(myrow);
}
document.body.appendChild(mytable);
}
function howmanyrows() {
var eerstetabel = document.getElementsByTagName("table");
alert('the browser says that this table has ' + eerstetabel
[0].rows.length + ' rows, which is not true');
}
</script>
</head>
<body>
<input type="button" value="run me first" onclick="domtable();">
<input type="button" value="then check the number of rows"
onclick="howmanyrows();">
</body>
</html>
It appears you can only "count" the number of rows in a real html table.
In my app I have a DOM table whose rows start with a plus sign. If you
click the plus, a new row should insert beneath it. Do I really have to
"id attribute" every single 'plus cell', I was hoping I could use the
index of my for loop.
I also read some about tbody, but why is tbody not necessary in the first
example?
Targetbrowser is FF 1.5
thx for any advise.
Ward
