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JavaScript - Get Id Of All Nodes

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Get Id Of All Nodes	View Content

I need to get the ID of all the nodes withing a DIV.

How do I do that?

Thanks,
C

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Getting Comment Nodes

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what's the fastest or easiest way to get all comment nodes into an Array?

the solution only needs to work in ie8/w3 if that helps.

Problems Getting Xml Nodes...

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I have your typical AJAX function that doesn't seem to be working quite well. :<

Here's the relevant portion of the StateChange function:

Code:

function StateChange()
{
  if(ttajax.readyState==4)
  {
    xmlDoc=ttajax.responseXML;
    if (!xmlDoc) {return;}

    var x=xmlDoc.documentElement.childNodes;
    var AlertVal = '';
    for (var i=0;i<x.length;i++)
    { 
      if (x[i].nodeType==1)
      {
        AlertVal += x[i].nodeName + ": " + x[i].firstChild.nodeValue + "\n";
//        AlertVal += x[i].nodeName + ": " + x[i].childNodes[0].nodeValue + "\n";
      } 
    }
    alert(AlertVal);


    var gameid = xmlDoc.getElementsByTagName('gameid')[0].childNodes[0].nodeValue;
    // Other ****
  }
}

Note the testing function there... It DOES return the Node Name! However, the firstChild/childNodes[0] is "null", and I cannot pull the nodeValue from it. :<

Here is a sample XML bit it's being tested on:

Code:

<?xml version="1.0" encoding="ISO-8859-1"?>
  <game>
    <gameid>16</gameid>
    <turn>24262</turn>
    <notturn>15010</notturn>
    <dateline>1275511672</dateline>
    <hcount>6</hcount>

    <ccount>4</ccount>
    <turn_html><![CDATA[
--Snipped--
]]></turn_html>
    <board_html><![CDATA[
--Snipped--
]]></logs_html>

    <cactivate>60580</cactivate>
    <cactivate>65401</cactivate>
    <cactivate>78720</cactivate>
    <cactivate>80275</cactivate>
    <sactivate>0</sactivate>
    <sactivate>1</sactivate>

    <sactivate>2</sactivate>
    <sactivate>3</sactivate>
    <sactivate>4</sactivate>
    <sactivate>5</sactivate>
    <sactivate>6</sactivate>
    <sactivate>7</sactivate>

    <sactivate>8</sactivate>
  </game>

Any help would be appreciated, thanks.

Set Style Attribute In Nodes

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I got this code

Code:

   Div= document.createElement("div");
	 Table= document.createElement("table");
	 Table.setAttribute("style","width:100px;height:100px;background-color : #708090;");
 	 Table.setAttribute("bgColor","#708090");
	 tr=document.createElement("tr");
	 td=document.createElement("td");	
	 text=document.createTextNode(aText); 
	 myTableBody = document.createElement("TBODY")
	 td.appendChild(text); 	 
	 tr.appendChild(td); 
	 myTableBody.appendChild(tr); 
	 Table.appendChild(myTableBody); 
	 Div.appendChild(Table); 		  

   document.getElementsByTagName('body').item(0).appendChild(Div);

Now it all works fine with the exception of the
Code:

	 Table.setAttribute("style","width:100px;height:100px;background-color : #708090;");

so I was wondering how do I set the style attribute in the table node?

All Nodes Values Null After Parsing

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So there is this string i need to parse as xml:
Code:

<station><code>GB0923A</code><city>ABERDEEN</city><population>215.000</population><component><name>Nitrogen dioxide (air)</name><unit>_micro;g/m3</unit></component><component><name>Nitrogen oxides (air)</name><unit>_micro;g NO2/m3</unit></component></station>

Now what I do is:
-use this function to create xml doc from string
Code:

function stringToXML(text){
if (window.DOMParser)
{
   parser=new DOMParser();
   xmlDoc=parser.parseFromString(text,"text/xml");
}
else // Internet Explorer
{
  xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
  xmlDoc.async="false";
  xmlDoc.loadXML(text);
} 
return xmlDoc;
}

-display it in that if statement:
Code:

if (xmlhttp.readyState==4 && xmlhttp.status==200){
        var response= xmlhttp.responseText;
	xmlDoc= stringToXML(response);
	var text="";
	text= text+ xmlDoc.getElementsByTagName("city")[0].nodeValue + "<br/>";
	text= text+ xmlDoc.getElementsByTagName("code")[0].nodeValue + "<br/>";
	text= text+ xmlDoc.getElementsByTagName("population")[0].nodeValue + "<br/>";
	document.getElementById("test").innerHTML = text;
	document.getElementById("loading").style.display = "none";
}

the stirng shown at the beggining is passed to "response" (var response= xmlhttp.responseText.
Now for some reason all 3 values displayed are null...
I am trying to figure why for last 2hrs but i cnt see any reason why they shouldnt be the actual values of nodes in the string...
Any help would be appreciated.

New Link Nodes Are Nesting Instead Of Being Inserted Where They Should Be....

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I am trying to write a little Greasemonkey script to insert links to open mp3s in the Google Player. It is supposed to insert "(play)" next to these links. (play) is a span element consisting of a text node "(", a link/"a" element, and another text node ")".

However, instead of inserting these new links next to each old link, it is putting them all in a row next to the very first mp3 link!

For example, if there are 3 mp3 links found on the page, the following is inserted next to the first links: (play(play(play)))

When the loop iterates over the whole array (i < links.length), the browser hangs until Firefox's slow script notification pops up and I click "Stop script"; then I see the nested links all next to the first mp3 link.

Additionally, the url itself is strange. Just looking at it, you'd think I was running a recursive function, but I'm not! The URL with a limited for loop (x < 21): http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=http://www.hackerpublicradio.org/eps/hpr0924.mp3&autoPlay=true&autoPlay=true&autoPlay=true&autoPlay=true&autoPlay=true&autoPlay=true&autoPlay=tru e.

Here is the script. I have been using the site http://www.hackerpublicradio.org for my testing.
Code:

var links = document.getElementsByTagName('a');
for (var i=0; i < links.length; i++) {
	var x = links[i];
	var url=x.href;
	if (url.search(/.*\.mp3/i) != -1) {
		var plink = document.createElement("a");
		plink.href = "http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=" + url + "&autoPlay=true";
		plink.target = "_blank"; //open in new tab
		plink.appendChild(document.createTextNode("play"));
		
		var pspan = document.createElement("span");
		pspan.style.fontSize = "90%";	
		var openb = document.createTextNode("(");
		var closeb = document.createTextNode(")");
		pspan.appendChild(openb);
		pspan.appendChild(plink);
		pspan.appendChild(closeb);

		x.parentNode.insertBefore(pspan, x.nextSibling); 
	}
}

No errors are showing up in the console. I've only tested it in Firefox 10. Please help me figure out where I'm going wrong!

Is There Any Dom Event To Monitor Loading Of Individual Nodes?

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i am interested in using RaphaelJS for creating VML/SVG rounded corners etc, but unless i physically put the <script> right after the element to which it needs to be applied, i have to rely on the single DOM load() event. which causes a delay before any script is executed,...thus a FOUC (flash of unstyled content).

i'm guessing there is no way to track when individual elements are loaded into the DOM via a CSS filter or similar, or another way around this other than having <script> in the body or just dealing the the load delay?

thanks,
Leon

Simple Js Game Of Interconnected Nodes - Problems Assigning Player Direction Choice

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I'm developing a simple game that involves a system of interconnected nodes with unidirectional travel between nodes (similar to the circulation system!). The goal of the game is to get from a starting node to an ending node, which can be a variable number of nodes away.

The program picks a random starting point, then randomly chooses one of its connecting nodes (cNodes) and pushes it onto a pathArray. A cNode is randomly chosen from this new node and it is pushed onto the pathArray. This continues for a designated number of turns, thus generating a pathArray (invisible to the player). The last element in the pathArray is the endNode and the goal of the puzzle.

At each node the player is given two options of travel (though there may be more than two ways to go). One of these options MUST be the correct way if the player has not deviated from the path up until that point. If the player has deviated, this option can be any cNode. The other node is any cNode that does not lead to the endNode.

The following code contains a simplified list of nodes that represents the content in my game. The function, however, is taken word for word. In this snippet, the pathArray & startNode have already been generated and I am trying to resolve how to assign "nodeChoice" as either the correct direction of travel (for a player on the correct path) or any random cNode (for a player who has deviated from the path). Keep in mind that the pathArray and cNodes lengths can be any size.

Code:

<script>

//NODES:
var nodeA = {name:"A"};
var nodeB = {name:"B"};
var nodeC = {name:"C"};
var nodeD = {name:"D"};
var nodeE = {name:"E"};
var nodeF = {name:"F"};
var nodeG = {name:"G"};
var nodeH = {name:"H"};
var nodeI = {name:"I"};
var nodeJ = {name:"J"};
var nodeK = {name:"K"};
//An array of all nodes in the system:
var systemArray = [nodeA, nodeB, nodeC, nodeD, nodeE, nodeF, nodeG, nodeH, nodeI, nodeJ, nodeK];

//Connecting Nodes (cNodes):
//(uni-directional, but cyclical)
nodeA.cNodes = [nodeB, nodeC];
nodeB.cNodes = [nodeD, nodeE, nodeF];
nodeC.cNodes = [nodeF, nodeG];
nodeD.cNodes = [nodeI, nodeH];
nodeE.cNodes = [nodeJ];
nodeF.cNodes = [nodeK];
nodeG.cNodes = [nodeK];
nodeJ.cNodes = [nodeA];
nodeK.cNodes = [nodeA];
nodeI.cNodes = [nodeA];
nodeH.cNodes = [nodeA];

//The path chosen (generated from code not included here)
var pathArray = [nodeA, nodeB, nodeE, nodeJ];

//nodeChoice will represent a cNode from any given node
var nodeChoice;

//chooseNode is supposed to assign nodeChoice the next element in pathArray if the player on on the right path (if at nodeB, nodeChoice = nodeE).
//However, if the user has taken a different path, its cNodes will not be in pathArray in which case a random cNode is assigned to nodeChoice
function chooseNode(_node) {
	//check each cNode to see if any are in pathArray
	for (var j = 0; j < _node.cNodes.length; j++) {
		//if a cNode is in pathArray, then we know to assign it nodeChoice...
		if (_node.cNodes[j] in pathArray) {
			nodeChoice = _node.cNodes[j];
			console.log("choiceNode CORRECT: " + nodeChoice.name); //(for debugging purposes only)
		}
		//...otherwise don't do anything in this forLoop/ifStatement
	};
	//if by this point nodeChoice is still undefined, meaning none of the current node's cNodes are in pathArray, assign it any one of its cNodes.
	if (nodeChoice == undefined) {
		nodeChoice = _node.cNodes[Math.floor(Math.random()* _node.cNodes.length)];
			console.log("choiceNode INCORRECT: " + nodeChoice.name);//(for debugging purposes only)
	};	
};

//Runtime:

chooseNode(nodeB);
//Result should be only nodeE.name since nodeD is not in the pathArray...
console.log(nodeChoice.name);

</script>

...however, nodeChoice is assigned either D, E or F randomly and we are given the troubleshooting statement "choiceNode INCORRECT: D (or) E (or) F", indicating that the if-in statement is always ignored.

I know that the if-in statement doesn't work but am not sure how else to write it so that each cNode is compared the each element in pathArray, both of which can be of variable lengths...