JavaScript Examples Bible - UserWorks Technologies

Chapter 1 ✦ Generic HTML Element Objects (Chapter 15)
Listing 15-3: Collecting Child Nodes
function walkChildNodes(objRef, n) {
var obj
if (objRef) {
if (typeof objRef == “string”) {
obj = document.getElementById(objRef)
} else {
obj = objRef
}
} else {
obj = (document.body.parentElement) ?
document.body.parentElement : document.body.parentNode
}
var output = “”
var indent = “”
var i, group, txt
if (n) {
for (i = 0; i < n; i++) {
indent += “+---”
}
} else {
n = 0
output += “Child Nodes of \n=====================\n”
}
group = obj.childNodes
for (i = 0; i < group.length; i++) {
output += indent
switch (group[i].nodeType) {
case 1:
output += “\n”
break
case 3:
txt = group[i].nodeValue.substr(0,15)
output += “[Text:\”” + txt.replace(/[\r\n]/g,””)
if (group[i].nodeValue.length > 15) {
output += “...”
}
output += “\”]\n”
break
case 8:
output += “[!COMMENT!]\n”
break
default:
output += “[Node Type = “ + group[i].nodeType + “]\n”
}
Continued
9
elementObject.childNodes