Evaluate Last 4 Characters Of File Name Using Javascript

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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Foist Javascript Into Another Frame, And Evaluate It In The Target Context

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 30, 2010

i have a html/php form which let users upload pictures onto my server. the problem with it is, it says the picture has been uploaded but if the file name contains any of character apart from text (A-z) and numbers, the picture never shows up in the admin panel.

is there a way using ajax or jquery to disallow certain file names in the upload field of the html which uses these characters !@#$%^'&*()"?

how do i go on about this?

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Nov 19, 2007

In IE, it looks like you can have to many characters in a javascript function.

The content of an entire html page is put into this function...

function updateTemplate(content) {
content=content.replace(/'/g, ''');
content=content.replace(/"/g, '"');
content=content.replace(/&lt;/g, '<');
content=content.replace(/&gt;/g, '>');
Element.update('template',content);
}
it seems to cut off the content after about 2060 characters. is that an IE thing or is there something wrong with my code. FF does it fine...

If it is an IE thing, is there anyway around it?

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Jan 3, 2007

I have a custom object named #cdata-section, however I am unable to
access this object and get a run time "Illegal Character" javascript
error. my object looks like this:

data.news.story[i].body.#cdata-section

The pound sign is causing problems. How can I use this object in my
javascript source? Right now I'm trying something like this to escape
the pound sign:

summaryNode.appendChild(document.createTextNode(da ta.news.story[i].body.u0023cdata-section));

however, that doesn't work, any ideas?

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Jul 13, 2006

I've been looking at this for a while now and I just can't get my head around it. What i need to do is put together a program which allows the user to type in a sequence of letters and then tells the user how many times they have included the letter 'a' in their sequence. So far i have put this together but the output is totally wrong at the moment and it often either just says 1 or 4. Code:

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Jul 20, 2005

My question is:

I'm adding character 253 to a javascript string this way:

var str = ''

str += 'a'
str += unescape('%FD');
str += 'b'

Is there another way to do this. Is there a function like: str += char(253)?

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Mar 6, 2006

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Oct 16, 2006

Initially the form is loaded using ASP and HTML and the ü codes
display the characters correctly. I have the values stored in a
javascript array so that I can more easily and dynamically change the
state/region dropdown when the country changes. However, when my
javascript code tries to add the new option and print out new region
the literal value such as "Würrtemberg" is displayed instead of
the special character.

Can this be done in javascript?

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I got an [object error] from IE 7.0.5730.11 when moving the <script
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<bodysection of a HTML file.

Is not possibile to include Javascript code via <script src="..."
type="text/javascript" /from the <bodysection, instead from the
<headone? If yes, anyone has any idea of which the problem could be?
If not, how can I programmatically include a javascript external file
inside the <bodypart of a HTML file, for example, using Javascript
to some particular native functions?

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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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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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Nov 21, 2006

I met a problem when using document.evaluate() to get text content
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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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Aug 31, 2009

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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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E.g. if I have this string:
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