posted 21 years ago
Jackie,
You can accomplish the counting part using the following code from O’reilly’s book – JavaScript the Definitive Guide. You’ll need to change it so it counts only the TR tags.
[CODE<head>
<script>
// This function is passed a DOM Node object and checks to see if that node
// represents an HTML tag: i.e., if the node is an Element object. It
// recursively calls itself on each of the children of the node, testing
// them in the same way. It returns the total number of Element objects
// it encounters. If you invoke this function by passing it the
// Document object, it traverses the entire DOM tree.
function countTags(n) { // n is a Node
var numtags = 0; // Initialize the tag counter
if (n.nodeType == 1 /*Node.ELEMENT_NODE*/) // Check if n is an Element
numtags++; // Increment the counter if so
var children = n.childNodes; // Now get all children of n
for(var i=0; i < children.length; i++) { // Loop through the children
numtags += countTags(children[i]); // Recurse on each one
}
return numtags; // Return total number of tags
}
</script>
</head>
<!-- Here's an example of how the countTags() function might be used -->
<body on..load="alert('This document has ' + countTags(document) + ' tags')">
This is a <i>sample</i> document.
</body> [/CODE]
Cheers,
Dan
William Butler Yeats: All life is a preparation for something that probably will never happen. Unless you make it happen.