How To Use Variables In Document.evaluate()

Nov 21, 2006

I met a problem when using document.evaluate() to get text content
using XPath, my code is as follows:

nodes = document.evaluate("/html/body/div/ul[1]/li[5]", document,
null,XPathResult. UNORDERED_NODE_SNAPSHOT_TYPE , null);

in the XPath expression "/html/body/div/ul[1]/li[5]", I need to
traverse from li[1] to li[5],
so I should use a variable here , like this:

for (index =1; index<6; i++)
{
nodes = document.evaluate("/html/body/div/ul[1]/li[index]", ....);
// the variable index here is invalid!
}
my question is: How to use the variable in XPath expression?

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Document.evaluate

Oct 14, 2006

i would like to evaluate a xpath expresion inside an iframe.

this is what i do :

1. find the iframe :

var f = document.getElementsByTagName('iframe');
2 evaluate the expresion :

var iterator = document.evaluate("//a", f[0], null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);

var aElement = iterator.snapshotItem(0);
alert(aElement);

the problem is that this expresion gives me the anchor of the root document, not the anchor inside of the iframe.

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Using Document.Evaluate Function On HTML String?

Oct 8, 2010

I was wondering if it's possible to capture a piece of HTML using XPath where the source is a sting rather than a document. I know how to use xPath and document.evaluate() as I've used it before on actual web pages - I just don't understand how to run it on a string of HTML.

E.g. if I have this string:
var stg = "<div>The best-laid schemes o' <span>mice</span> an' men</div>";
I'd like to convert this string into something that I can run the document.evaluate() on so that I can find the contents of the SPAN element (without loading the string into a real browser page).

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[Code]..

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May 17, 2009

When assigning a value to a variable within a function, does that variables value become available to other functions within the document?

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Jul 23, 2005

I have a PHP page generating a list of items. I've made it so that
each one has a radiobutton with a unique value. You can click on the
radiobutton and it will change the value of a text field to the value
of the radiobutton--all that works fine!

Now, I need to also have it populate a textfield with the value of a
textfield in the row that's selected.

I can make unique field names, no problem. I think my problem is
getting the javascript written so that it recognizes the variable.

Well, see below. As it's written below, the textfield "itemqty" always
has the value "NaN" (wherever THAT comes from) no matter which
radiobutton I select.

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Oct 7, 2009

I am trying to write a multiple-choice quiz for my chemistry class where ten questions are selected randomly from a block of about 100; then I want the students to click a button and grade their quiz. I have stored the questions in an array named Q and each radio button has a name property corresponding to the array entry (the buttons in Q[1] have the name Q1, etc.). I generate the exam in the body of the page between form tags using a document.write statement and all of the questions and buttons appear properly. I cannot, however, figure out how to get the value of the button that has been checked for the randomly selected questions.

As the questions are selected, I record the question number as a variable; for example �Qnumber1 = Q(random_num)�. The variable does, in fact, have the proper value (for example Q1) but when I try to read the value of the radio buttons in the Q1 set using:

document.form1.Qnumber1[0].value

it doesnt work!

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Pull Variables From URL And Post In Document Code?

Jan 17, 2009

my url read index.html?pagego=collections

here it he code I have that is pulling the variables from the URL

function getUrlVars(){
var vars = [], hash;
var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');

[Code]....

and here is the code I use to alert

var hash = getUrlVars();
alert(hash['pagego']);

this works perfectly and alerts with the variable when I load he page.

Now when i am embedding my flash file i want to pass the variable to my flash by just adding the variable value to my embed code.

how can I do this?

here is my swf embed code

var so = new SWFObject("main2.swf?pagego="+THIS IS WHERE I WANT THE VARIABLE TO BE, "Preview", "100%", "100%", "9", "#ffffff", true);
so.addParam("scale", "noscale");
so.addParam("salign", "lt");
so.write("flashcontent");

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Nov 3, 2010

I have a script that will loop through all the INPUT elements of a form; if the input is a submit it will disable the submit (or enable the submit, depending upon what is passed to the function.) I hate using eval() - I avoid it whenever I can! Is there a better way to dynamically process the ".disabled = 'true'/'false';" portion?

[Code]..

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May 7, 2009

The following example works great in Firefox, and Chrome but fails miserably in IE (6,7,8). I'm running JQuery 1.3.2 if it makes a difference:
$('resp',"<root><resp>value</resp></root>").text();
That evaluates to "value" in everything except IE.

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Function To Change Variables In A Document.getElementById("test").innerHTML=..

Nov 1, 2011

<html>
<head>
<script type="text/javascript">
var a = january
var b = febuary
var c = march
function test()
[Code]...

I tried to explain it pretty well in the comment tags

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Aug 31, 2009

Curious about the following issue. I currently have a dynamic drop-down based on the value of each option.. If selection in top drop-down is B it will show all options with a B contained in the second/resulting drop-down.

Now - I also want to evaluate the options by having the script check for a few keywords..

Example - have it evaluate the drop-down on page load for options with text containing 'blah123' (ex. <option value="0323G">Qwerty - blah123</option>). And if any of the options have that text the script will generate an additional drop-down menu allowing you to select blah123 or other specified text. Say another thing I'd like to search each text string for is 'abump'. If there is 'blah123' and 'abump' contained within the drop-down, a third drop-down menu will be generated (as said before) with only blah123 and abump as options. Whichever of these is selected will narrow down the options available in the final drop-down menu.

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Dec 31, 2007

I have built a page on a recruitment website which allows users to upload their CV via ASPUpload i.e a browse button. However I want to limit the file type to just MS Word documents as I do want them uploading large PowerPoint files etc. My idea is to have some javascript which evaluates the last 4 characters of the file name to ensure it is .doc
So if they try to upload anything other than a .doc file a dialogue box will appear stating that they must only upload MS Word Document (when they click the Upload CV button).

Does anyone know how I can evaluate the last 4 characters of the file name? Once the user has browsed to their CV on their PC the path & file name will appear in a text field called CV.

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Jul 23, 2005

I don't know how to evaluate the no-blank selections against each other from a form as follows: .

I have a form with 6 dropdown fields, each containing a selection of 30 options (the 30 options are the same for each dropdown list). The user needs to select 'one of the 30 options' from each dropdown selection, but each option they select must be unique (no duplicate selections) or it must be left blank. E.g. The user can select Option3 within "dropdown1", but must select a different option for the other dropdowns - OR leave them unselected.

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Oct 18, 2009

I am returning the present time - then using the .substr to remove all digits except the last two on the right (i.e effectively returning the value 32 from 65344532) I am then looping, subtracting 11 from that number until the value is less than 11. The intent being to then return the value from the appropriate matching array ID code...

The problem arises with evaluating two digit numbers beginning with zero - In cases where the last two numbers are greater than 09, the looping returns a 1 digit number for valuse less than 10, in cases where the last two digits begin with zero the loop will not begin. I have attempted to use the switch(n) to determine if any 01, 02, 03 ... etc exists but this is not evaluating correctly - is this due to using the date/time object and if so is there a good way to convert this to either a numeric or string datatype where the case can be evaluated correctly?

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Jan 20, 2010

I am trying to populate page elements from an AJAX call, which returns JSON.

For some reason, JSON that looks like this, fails to evaluate, I'd like to understand what's wrong with it.

JSON:

Code:

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Dec 16, 2006

I have an outer page and an inner iframe. The outer page calculates some
javascript, and wants the inner frame to run it. The inner frame should hit
a page on the same (private) web server, so this is not a cross-site
scripting attack. But I would prefer not to taint the target page with any
extra logic to do this. (I will if I must.)

The calling page has these elements:

<script src="/javascripts/prototype.js" type="text/javascript" />...
<span id='update_me'>yo2</span>
<iframe id='grinder' src='sample.html' >
</iframe>

So here's most of the page which the iframe hits:

<script src="/javascripts/prototype.js" type="text/javascript" />...
<body bgcolor='silver'>
<span id='update_me'>yo</span>
</body></html>

Note that both the outer and inner page have a span with the same ID.

This question will resemble a JavaScript FAQ - how to evaluate Javascript on
the fly, or how to reload a JS file. The answers on the web generally do not
transport the JS across a frame boundary, so they don't address the bug I
encountered, and I can't tell if prototype.js or IE is at fault.

The outer page calls Ajax goodies that generate some JS looking like this:

Element.update("update_me", "here I B");

The page sends that, as a string, into this JS (in application.js):

function update_grinder(sauce)
{
var grinder = $('grinder');

if (grinder)
{
var doc = grinder.contentDocument;
if (!doc) doc = grinder.document;
if (doc)
{
evaluate(doc, sauce);
return;
}
}
document.write("your browser sucks");
}

So that contains enough logic to find the iframe's document, and it works
for Firefox, IE, Konqueror, and Opera. The code calls evaluate() with the
document where we need the evaluation context, and the string with our
source.

Here's evaluate():

function evaluate(doc, sauce)
{
var s = doc.createElement('script');
//s.defer = true; // <-- no effect
s.text = sauce;
var body = doc.getElementsByTagName('body').item(0);

if (body)
{
body.appendChild(s);
return;
}
body = doc.body;
if (body)
{
body.appendChild(s);
return;
}
}

That creates a <scriptblock, sticks our string in as its contents, and
pushes the block to the end of our <bodytag. Now here's the bug:

Firefox updates the inner <span id='update_me'>, and IE updates the outer
one.

If I remove the outer <span id='update_me'>, then IE simply can't find it
and throws an error. Even though it evaluates a script block clearly in the
context of the inner iframe.

I have tried calling the script from setTimeout, and from a button's onclick
handler.

Is there some script.aculo.us way to fix (yet another) bug in IE? Or is this
a bug in prototype.js?

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Aug 3, 2010

I need to pass the current window location through a hidden input to a php form handler. I tried this:

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And this: Code: <input type='hidden' name='curpage' value='javascript:print window.location;'>

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P.S. I know I could make the javascript a file and load it separately. I know I can make my response JSON and have the js and html in separate properties of the JSON object. I want neither.

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Code:
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I want to use the DOM interface to build SVG dynamically inside an HTML
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My intentions/goals:

In Javascript, I construct an object 'embedSVG' which has properties and
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During construction, the SVG document is created with its root element.
During debugging in FF 2.0 (I'll work on an MSIE-compatible format later),
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However the child node (#document) does not specify 'svg' as the root
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Here is the relevant code in 'ScriptTest.html' which is the HTML in which
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What this code is supposed to do is load the HTML page and execute the
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Where am I blowing it?

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[Code]..

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