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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'

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