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Rich ajax applications that do not break if javascript is disabled.
This is a great solution for dealing with checking whether the clients browser has JavaScript enabled/disabled, and then coping with either scenario: Rich ajax applications that do not break if javascript is disabled.
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Cross Browser Support for DOM Events
Firefox follows the DOM standard and passes an event object to each event listener, however has the global event: windows.event. Problem:I wanted to fire a piece of javascript after the user keyed some text and pressed enter or clicked a button. The skeleton code is below:<input id=”NewsletterEmail” value=”Email here” type=”text” onfocus=”javascript:this.value = ”;” class=”WiderLoginTextBox” /><input value=”OK”…
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Examples of Regular Expressions
Trim string in JavaScript var trimre=’^s+|s+$’; // replace whitespacevar trimmedstring = string.replace(trimre,””); Check for a valid date format in JavaScript var re=’^(d{1,2})/(d{1,2})/(d{4})$’; // dd/mm/yyyyif (!datestring.match(re)){ alert(“Date” + datestring + ” not in valid dd/mm/yyyy format”);}else // valid date keyed in{ …valid date keyed} More to follow…
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Insert JavaScript before PostBack Event
To call some javascript before the postback event is raised, use the following code: if (!Page.ClientScript.IsOnSubmitStatementRegistered(type, “script_onsubmit_editor_” + ClientID)) { string popTextareaScript = “var ed = YAHOO.widget.EditorInfo.getEditorById(‘” + editor.ClientID + “‘);” + “ed.cleanHTML();”; Page.ClientScript.RegisterOnSubmitStatement(type, “script_onsubmit_editor_” + ClientID, popTextareaScript); } In the above code example I was trying to populate a textarea from the YUI Editor.
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Debugging JavaScript with Visual Studio.net
The following piece of advice was taken from a blog (click here to see original) discovered while I was searching for a solution to debugging JavaScript in Visual Studio.NOTE: Currently only works is IE, I have not investigated using Firefox. ASP.Net makes it very easy to write and debug server side code. I’ve found when…
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