In order to calculate the user’s available screen width and height use the screen object: [Read More]

The JavaScript replace() function does not replace all instances of the query string - only the first one encountered. This function replaces all instances of the unwanted string. [Read More]

There are number of ways you can trim strings using javascript. The best way is to prototype the string object, adding a trim method, so you can perform the action by merely calling “string.trim()”. [Read More]

Error trapping with JavaScript only works for newer generation browsers. However, older browser generally ignore window.onerror code, so it is worth putting in. There are two ways to do this: [Read More]

Regular expressions are objects in JavaScript. For example, if you have an input field that should only allow characters a-z (lower and upper case) and numerical digits, you could use regular expressions to do the input validation as follows: [Read More]