Javascript Function

The popup windows that we have looked at so far in this tutorial series have poppped up at whatever position on the screen that the browser thought was appropriate. This may be okay some of the time but wouldn't it be better if ...

There may be times when you want to place multiple links on your site that are all intended to open a popup window but displaying different content in that popup window. Rather than annoy your visitors more than necessary by crea...

If we are going to reuse the same popup window for calls from multiple links (as discussed in the last tutorial) then there may be times when these popups actually need different sized windows. We can handle this situation by pa...

Enough of the theory. It is time to take a loop at how we can apply all of what we have learned in the prior tutorials to create a popup window. One problem faced by many web ...

Let's now go one step further than just creating a popup window containing a larger version of the thumbnail image. Let's create a complete web page to hold bot...

A regular expression is a pattern that uses a special syntax to describe the content of a text field. It can be used either to validate that the string contains a valid value or alternatively it ...

Regular expressions are a very powerful tool when it comes to being able to perform field validations, compare values, perform substitutions and numerous other tasks that would otherwize require ...

As well as being able to test if some text contains a particular pattern we can also use regular expressions to retrieve all of the occurrences of a particular pattern from within some text and s...

The replace method available on string objects can be used to substitute one value for another in any text string. While this method can use ordinary text strings for both the text to find and th...

The split method available on string objects can also be used with regular expressions. This allows you to be a bit more flexible in the delimiters that you use within a text string that is typed...