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I am creating an ajax chat in rails and I am trying to get a div to scroll to the bottom without much luck.

This is a design question. I have data that needs to go into an HTML table, which will later be manipulated by the user. Basically the user will be able to select items in the table rows.

I basically need to highlight a particular word in a block of text. For example, pretend I wanted to highlight the word "dolor" in this text:

I know, I know, title is quite bad, but I'll try to explain what I mean here. So, I ask my members to show their photos. They upload it somewhere, then paste their photos' URL into input and I save it to my database (MYSQL). Then, the photo is being seen on their profiles. I get the URL from database and do something like that: <img src="<?=$photo;?>" height="123px" width="123px">"> where $photo is URL taken from MYSQL. Is it totally safe? Can somebody upload for example .php file and harm my website? Do I need to check if URL's ending is .gif, .png, .jpg?

I'm working on some JQuery to hide/show some content when I click a link. I can create something like:

I am teaching a web development course at a CS department, I wrote most of the final test by now, each question focus on a specific feature or a specific technology,

If I am not grabbing any information from the server but I want to reload/refresh a div every N seconds how do I do this?

I am trying to scrape the datas from a webpage, but I get need to get all the data in this link .

I'm implementing my own Progress Bar using jQuery. My question is how can I fill (for example) only 30% of it with a background ? What are my options ? Basically, the Progress Bar is a simple div with rounded corners (-moz-border-radius). I'm using Firefox 3.6.3.

How do you calculate the number of input boxes with no value in a table row using jquery?

I have a simple login form with 2 input fields: "username" and "password". "username" field is focused by default. The problem is that when user clicks outside "username" or "password" fields, the focus is gone (it is neither on "username" nor on "password" fields"). How can I force the focus to be on these 2 fields only ?

I am coding a webpage to be viewed on iPad. It uses Safaris/Webkits drag & drop. I have exactly copied Safari's example drag & drop code but it wont work.

I'm reviewing some html produced by an outside shop. They use comments inside their external script loading tags - so far as i'm aware this was only useful for very old javascript unaware browsers is there any modern function for this or is it redundant?

Html Textarea elements only wrap when they reach a space or tab character. This is fine, until the user types a looooooooooooooooooooooong enough word. I'm looking for a way to strictly enforce line breaks (eg.: even if it results in "loooooooooooo \n ooooooooooong").

Which text editor has the most useful autocomplete for text editing?

i have already printed pages of A4 size in printer image is attached! now i want to print data in blank fields from webpage any one guide me how to achieve this?

I'm making a mobile-friendly stylesheet for a page of mine. Is there a simple way to make it show that stylesheet to iPhone/Android users? Or do I have to pull the user-agents and figure it out that way - and how do I do that?

I have a long pre block, I want it to be view in mobile browsers, such as iPhone

I have read w3's page on this here , but it is still vague to me. Is the role attribute's purpose to clarify the code? Or will it be interpreted by some browsers or spiders? Can it be used as a dom selector using some javascript libraries (I am thinking that since the id attribute has to be unique, this could be use to identify multiple resources on a page)? Source: Tips4all

I've never done anything with payment gateways, can anybody give me suggestions? Source: Tips4all