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Posts tagged: browser

JavaScript IsDate(): Validate date according browser locale

By , 07/20/2010 1:40 PM

In one of my recent projects I needed to validate whether user’s input is a valid date, and this needed to be done client-side, in browser prior submission to the server. Lazy as I am, I Googled for a ready-to-use code snippet. There’re plenty of versions out there, but most of them offer incomplete solution and none of them take into account browser locale, you know – the language settings:

So I decided to cook something of my own Continue reading 'JavaScript IsDate(): Validate date according browser locale'»

WARP, UltraWebGrid and ScriptManager glitch in IE6 and IE7

By , 07/16/2010 3:51 PM

This is probably a very obscure situation, but it happened to me, it could happen to someone else. Scenario: an ASP.NET page with Infragistics UltraWebGrid inside of a WARP panel. A button outside the WARP serves as a trigger for partial postback. First click on the button causes expected partial postback, but on the second click page does full postback and is screwed after that. The issue happens only in IE6/7, page works correctly in IE8.

Another condition – page contains ASP.NET AJAX ScriptManager control with ServiceReference path pointing to an ASMX WebService.

Turned out the issue was caused by project being left in debug mode (in web.config debug=”true”). Which caused WebService page to be loaded with parameter “jsdebug” in query string. Which apparently IE6 and 7 didn’t like very much. Switching to debug=”false” in web.config solved the problem.

How to Disable hyperlink clicks

By , 07/08/2010 12:38 PM

Hyperlinks are designed for clicking, to lead you somewhere else, but sometimes this  behavior is undesired. In my case a grid control displayed some HTML data in its cells (including hyperlinks) and clicking on those links caused some undesired effects. I still wanted to display HTML and allow clicking on other grid elements (e.g. checkboxes) just needed a way to prevent hyperlinks clicks.

Remember that events bubble? That gave me an idea to wrap the grid control in a DIV to catch click events. This way I can check event source and if it’s a hyperlink – cancel the event, otherwise allow it. Well that’s pretty much it. Here’s a stump for the DIV wrapper:

<div onclick="return checkClickSrc()">
    <!-- Controls to check go here-->

and here’s the JavaScript code that does the check:

function checkClickSrc() {
    return event.srcElement.tagName != 'A'
    //for firefox: return event.target.tagName != 'A'

IE8 Idiotic Session handling

By , 04/20/2010 10:45 AM

As you may be aware Internet Explorer 8 will share session among its different instances (even if you start new instance by clicking IE Desktop icon). Why on Earth this was done is described in this article. The only way to start a new session is to use obscure File -> New Session option in menu, interesting choice, considering that in IE8 menu is hidden by default.

But this is not the end. Quoting the article:

Relying on closing the window to clear the session is not a recommended way to implement proper logoff for an application. Because this clearly will not work if there is another window that is sharing the session.

True, buy why, pray say, session isn’t cleared for one application if its window closed, but another window remains open, pointing to a completely different application, on different server in different DOMAIN?!

Do try this:

  1. Login to any app that that requires user login.
  2. Open a new browser, and point it anywhere to a completely unrelated link.
  3. Close original app window from Step 1.
  4. Open new browser window and go URL of app from Step 1.
  5. Surprise, surprise, you’re still logged on.

Also, aren’t ¬†they aware that 99.9% of all users will simple close browser window instad of going thru logout process even if it takes only one click? And in many scenarious, including one above user will stay logged in.

The value of the method attribute may not be html. Solution for the error.

By , 01/19/2010 3:06 PM

If you get the following error while browsing a page in Internet Explorer:

The value of the ‘method’ attribute may not be ‘html’

chances are MSXML registration is corrupted on your machine. To fix this, open DOS prompt and type following commands:

regsvr32 msxml.dll
regsvr32 msxml2.dll
regsvr32 msxml3.dll

This will re-register MSXML and the error will go away.

Resizing IE Modal Dialog in JavaScript

By , 12/03/2009 11:44 AM

If you open an IE Modal Dialog window and later on need to resize it using JavaScript code, standard “window.resizeTo” method doesn’t work. Use dialogWidth and dialogHeight instead. For example:


Session crossover in IE8

By , 11/06/2009 2:38 PM

In IE6/7 if you open 2 independent browsers (not using “New Window” or “New Tab”) they do not share common session and you can login to, let’s say, a web mail account under 2 different users at the same time.
This is not the case with IE8. Using 2 browser (and seeing 2 “iexplore.exe” processes in task manager) if you try to login as 2 users – the second will take over the first. I guess it’s a new “feature” of the browser.
But IE8 gives you a way out, albeit not obvious one. In menu, you can select File -> New Session. This will open a new browser window with independent session.

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