onLoad javascript for images: it's the right thing to do?
I just learned that I can increase the speed of my lightbox galleries using this javascript:
< script type = "text/javascript" >
If (document.images) {}
img1 = new Image();
img1. SRC = '... /Gallery-mural/Fantasy-Landscape.jpg ';
img2 = new Image();
img2. SRC = '... /Gallery-mural/marine-mural.jpg ';
img3 = new Image();
img3. SRC = '... /Gallery-mural/shoaling-Fishes.jpg ';
img4 = new Image();
img4. SRC = '... /Gallery-mural/Tangerine-Lanterns.jpg ';
img5 = new Image();
img5. SRC = '... /Gallery-mural/Theatre-foyer-mural.jpg ';
img6 = new Image();
img6. SRC = '... /Gallery-mural/yachts-and-Seagulls.jpg ';
}
< /script >
What is the right way to go?
I have 8 pages of the gallery with the same number of frames but all different of course. Is there an easy way to combine this to all 8 pages or would it be acceptable for her pop on each page?
Thank you
Martin
Basically, what you're doing are preload the images, regardless of the question of if the visitor never will select an any of them. Preloading has the advantage that the response of your lightbox will be instant. It has the disadvantage of unnecessarily slow down the loading of the page, as well as the increasing use of bandwidth. For a small number of images, it is probably worth doing. However, the images more there are, the more become disadvantages. If someone really wants to see your images, a slight delay is probably OK.
Another approach would be to preload the first pictures of two or three and then load the following images in the background that every image is available. I don't know if there are scripts that do this out of the box, but it is certainly something that could be achieved with careful script JavaScript. And no, I have not done it myself, but it is certainly possible in theory.
Tags: Dreamweaver
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