Validating special characters in javascript

Posted by / 05-Jan-2020 20:37

Validating special characters in javascript

x,y and z (word) – find the “word” specified in the round brackets [abc|xyz] – find either the characters a,b,c or x,y,z We’ll start first with validating a textbox that accepts only numbers.

So the condition is we check whether the textbox contains anything ELSE other than numbers and display a message As you can see the function validate() checks if the entered string contains characters that does NOT (notice the ^ symbol) match the numbers 0 to 9 including white spaces and special characters.

IE doesn't enable scripting on local web pages until you choose to enable it from the yellow info bar.

See for an example: It seems to work on the test code that I created from your post, so assuming that your test code is the same, there must be something else causing the problem. Commonly the most effective way is for you to link to a test page that you have on the internet, or failing that, you can attach a file to a post. The script will only run when scripting is actually enabled.

A decent start, but a) although it warns users if they hit an icorrect key, the character is still entered into the textbox, so could still be submitted; b) users can still paste illegal characters in, and this code will not pick up on this.

After reading this article you’ll be able to do advanced javascript validation using regular expressions a.k.a.

The following is how regular expressions can be used [abc] – find any character in the brackets a, b or c [a-z] – find the range of characters within brackets i.e. Can also be used with numbers [0-9] [^xyz] – find any character other than the ones specified in the brackets i.e.If you're testing a local page on IE, be sure to enable scripting.See for an example: Active X Warning in Internet Explorer | Internet Explorer has restricted this webpage from running scripts or Active X controls Thanks for ur help.Reg Exp for basic javascript validation read Javascript Validation – Textbox Combobox Radiobutton Checkbox.Using regular expressions the entered content can be validated with advanced conditions like the string entered shouldn’t contain spaces, special characters, numbers, uppercase or lowercase etc.

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I am trying to solve an issue where in one of the forms where I want to allow the values inserted to be special characters from other languages, but not symbols such as (, Hi, I've created a web application using struts. -Los What if we don't want to restrict to just ISO-8859-1 characters? I tried your approach but for some reason the javascript parser doesn't recognize the utf-8 characters still.

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