// ---------------------------------------------------------------------------
// --- Name:    Easy DHTML Treeview                                         --
// --- Original idea by : D.D. de Kerf                  --
// --- Updated by Jean-Michel Garnier, garnierjm@yahoo.fr                   --
// ---------------------------------------------------------------------------

/*****************************************************************************
Name : toggle
Parameters :  node , DOM element (<a> tag)
Description :     Description, collapse or unfold a branch
Author : Jean-Michel Garnier /  D.D. de Kerf
*****************************************************************************/

function toggle(node) {
    // Get the next tag (read the HTML source)
	var nextDIV = node.nextSibling;

	// find the next DIV
	while(nextDIV.nodeName != "DIV") {
		nextDIV = nextDIV.nextSibling;
	}

	// Unfold the branch if it isn't visible
	if (nextDIV.style.display == 'none') {

		// Change the image (if there is an image)
		if (node.childNodes.length > 0) {

			if (node.childNodes.item(0).nodeName == "IMG") {
				node.childNodes.item(0).src = getImgDirectory(node.childNodes.item(0).src) + "minus.gif";
			}
		}

		nextDIV.style.display = 'block';
	}
	// Collapse the branch if it IS visible
	else {

		// Change the image (if there is an image)
		if (node.childNodes.length > 0) {
			if (node.childNodes.item(0).nodeName == "IMG") {
  				node.childNodes.item(0).src = getImgDirectory(node.childNodes.item(0).src) + "plus.gif";
			}
		}
		nextDIV.style.display = 'none';
	}
}

/*****************************************************************************
Name : getImgDirectory
Parameters : Image source path
Return : Image source Directory
Author : Jean-Michel Garnier
*****************************************************************************/

function getImgDirectory(source) {
    return source.substring(0, source.lastIndexOf('/') + 1);
}