Issue with IE7 Dropdownlist not appearing after changing class name when onFocus event is triggered for the first time

I need to adjust the CSS class of a dropdownlist when it is focused on, in order to change its background color.

However, in IE7, when the dropdownlist is clicked, the CSS class changes but the options list does not appear until the dropdownlist is clicked again. This issue does not occur in Firefox.

I came across advice suggesting the use of the onfocusin event as well:

However, this did not resolve the problem.

The onfocus event is added to the dropdownlist in the backend code:

ddl.Attributes.Add("onfocus", "setCssClass();");

The javascript function used to set the class is:

ddl.className = "Class1";

If anyone has insights on this issue, please assist!

c#javascriptasp.netinternet-explorer-7

Answer №1

I want to express my gratitude to everyone who took the time to read through this, but I managed to uncover the solution on my own.

The issue seemed to be isolated to specific controls triggering when focused. These particular controls had onblur events that manipulated the dropdown's class as well.

Initially, I assumed these onblur events would execute before onfocus/onfocusin, however, it turns out that is not the case. The onblur events were causing the dropdown list to close by applying the class change.

So, now I've implemented a check within these onblur events to identify if the dropdown list is in focus. If it is, I prevent the main logic from running within the onblur function, resulting in everything functioning as intended.

Answer №2

When dealing with Internet Explorer, adding a hardcoded "onfocus" event can result in requiring two clicks for functionality to work properly. This is a known issue with IE that may not have a perfect solution. Even if you include an alert within the anonymous function of the .focus() callback, you might still need to click the dropdown twice. It's a quirk that demands some creativity.

To work around this issue, consider using jQuery's .focus event instead.

jQuery([dropdownlist object]).focus(function() {

 ... insert code here

});

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