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Script Title: restrictText
Programming Language: Java Script
Date Completed: 2012/10/07

Purpose: To restrict the text input.

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Description: Java Script and HTML have no easily way to restrict the text input of a field. Adobe’s Flash has a simple and easy way to restrict the text input of a field. This Java Script Class provides a similar method to restrict the input.

Returns undefined if a value is not defined, returns true if the start function was successful to activate.

Compatibility: Works with all modern Web browsers.

Methods:

var class = new restrictText();

class.targetId// Set or returns the targeted element ID *Required
class.regExp// Set or returns the regular expression *Required
class.isActive// Returns true or false if the filter is active
class.start();// Function to start the filter
class.stop();// Function to stop the filter

Example Usage:

var myFilter = new restrictText();
myFilter.targetId = “input”;
myFilter.regExp = “[^A-Za-z0-9]”;
myFilter.start();

Restrict the text input to Uppercase/Lowercase Alphabetical letters and Digits.

Expression Examples:

[^A-Za-z0-9]// Allow all but special characters
[A-Za-z0-9]// Allow only special characters
[^0-9]// Allow only digits
[0-9]// Allow all characters but digits

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