Using javascript, I have a file in string (got with ajax request). How to upload it as file to server by another ajax request ? Answer You need to set the Content-type request header to multipart/form-data and play around with the format a little, I wrote this in Plain Ol’ JavaScript ™ but you cou…
How to get caller element using JavaScript?
I have a table with id “tbl” and it has 2 rows and 3 cols. Each cell (td) has an explicitly defined id. Also, the table has an onclick event that calls a function foo(). The onclick() would be generated whenever any cell is clicked. The table tag is: I also tried javascript:foo(this) I want to fin…
AJAX Problem – No response text in FireFox, but ok in IE
I am making a simple AJAX call to an external site. It works ok in IE, but in Firefox, not response text is returned. I think it might have something to do with the response being “chunked”, but I’m not sure. Any ideas? Thanks. Answer Is your page hosted at http://drc.edeliver.com.au also? I…
How to stop propagation of a bound function not the entire event?
I have a click function bound to many elements. It is possible that sometimes these elements may sit within one another. So, the click event is bound to a child and also bound to its parent. The …
getting file size in javascript
given a path of a file like: C:file.jpg how can i get the size of the file in javascript? Answer If it’s not a local application powered by JavaScript with full access permissions, you can’t get the size of any file just from the path name. Web pages running javascript do not have access to the lo…
jQuery Youtube URL Validation with regex
I know there is plenty of question answered over here https://stackoverflow.com/questions/tagged/youtube+regex, but not able find a question similar to me. Any body has the JavaScript Regular expression for validating the YouTube VIDEO URL’s line below listed. Just want to know where such a URL can be p…
When iterating over values, why does typeof(value) return “string” when value is a number? JavaScript
I’m using Google Chrome for this test: Contrary to intuition, the first loop alerts “string” three times, while the second loop alerts “number” three times. I was expecting both loops to alert “number” three times. How is the first loop implemented in JavaScript? In o…
Asynchronous Controller is blocking requests in ASP.NET MVC through jQuery
I have just started using the AsyncController in my project to take care of some long-running reports. Seemed ideal at the time since I could kick off the report and then perform a few other actions while waiting for it to come back and populate elements on the screen. My controller looks a bit like this. I t…
What makes an input vulnerable to XSS?
I’ve been reading about XSS and I made a simple form with a text and submit input, but when I execute <script>alert();</script> on it, nothing happens, the server gets that string and that’s all. What do I have to do for make it vulnerable?? (then I’ll learn what I shouldn’…
How to format a number with commas as thousands separators?
I am trying to print an integer in JavaScript with commas as thousands separators. For example, I want to show the number 1234567 as “1,234,567”. How would I go about doing this? Here is how I am doing it: Is there a simpler or more elegant way to do it? It would be nice if it works with floats al…