Some older browsers are incompatible with JavaScript. JavaScript can also be turned off on many browsers. You can turn it off on Netscape by going to Edit > Preferences > Advanced and unchecking the Enable JavaScript checkbox. It is therefore a good idea to make sure that someone viewing your page without a JavaScript enabled browser can navigate your page properly. For examp le, creating links as alternatives to using the pull down menu above would provide such accessibility.
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JavaScript allows us to change the text in the status bar of the window through the window.status property.
We will now show you how to place a welcome message on the status bar as soon as your page finishes loading. The event handler goes in the opening <body> tag
1. Put this code in the body of your HTML document: (more…)
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We saw that a MouseOver can be used to change the image displayed when the mouse rolls over an image. This has an interesting application in animated images. Let’s say we have two versions of a GIF image, one of which is a still and one of which is animated. We can use a MouseOver to animate a still image when the mouse rolls over it. In your class files folder you have two images, logoscroll.gif and logostill.gif which can be used to create this effect. (more…)
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We will now look into creating a menu using Javascript. We will create a simple menu, which has a number of clickable options. There will be a single image which changes when options is selected. We will also create a function which takes care of changing the menu image. You will be using the images dog.gif, cat.gif and hamster.gif (download from net or make it in photoshop) (more…)
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