Javascript is a programming or scripting language primarily used for client-sided programming in web browsers. It can also be used as a server-side programming language but this is generally used less often. Javascript was originally created by Netscape for their browser Netscape Navigator, and is now an implementation of the ECMAScript standard. It is typically used in web browsers for form validation, floating navigation, AJAX and other nifty things to make web pages more interactive.
I looked at how to set default values for parameters in a Javascript function the other day and in this post look at the arguments object which can be used to work out how many parameters were passed to a function and also to loop through each of them.
I recently needed to post an HTML form into a popup window instead of targeted to the current document or an existing window. The Javascript for doing this is very simple and in this post I show how to post the form into a popup window with regular Javascript and then with jQuery.
If a window has been opened with the Javascript window.open function, that window can be referenced using window.opener. This post shows some examples about how to do this.
This post shows how to change the cursor on a web page with Javascript by assigning a value to the document.body.style.cursor property.
Following up a couple of earlier posts about get the mouse co-ordinates with jQuery and how to get the co-ordinates when an element is clicked, this post looks at how to do both of these but with co-ordinates relative to the element itself so i.e. the top left co-ordinate is 0, 0 instead of some other value relative to the page.
By default, when a user clicks a text input field in an HTML form the cursor is positioned in the text input but the text is not selected. Using jQuery’s select() function it’s easy to make the text be selected when clicking into the field.