opacity

http://www.clagnut.com/sandbox/imagefades/


function setOpacity(obj, opacity) {
opacity = (opacity == 100)?99.999:opacity;

// IE/Win
obj.style.filter = "alpha(opacity:"+opacity+")";

// Safari<1.2, Konqueror
obj.style.KHTMLOpacity = opacity/100;

// Older Mozilla and Firefox
obj.style.MozOpacity = opacity/100;

// Safari 1.2, newer Firefox and Mozilla, CSS3
obj.style.opacity = opacity/100;
}
function fadeIn(objId,opacity) {
if (document.getElementById) {
obj = document.getElementById(objId);
if (opacity <= 100) {
setOpacity(obj, opacity);
opacity += 75; // the level of darkness (100 - high, 0 - low)
window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);
}
}
}

function initImage() {
imageId = 'thephoto';
image = document.getElementById(imageId);
setOpacity(image, 0);
image.style.visibility = 'visible';
fadeIn(imageId,0);
}


window.onload = function() {initImage()}
document.write("<style type='text/css'>#thephoto {visibility:hidden;} </style>");


Can anyone see a way to speed up the change from my original image to the white image?

The opacity?

not very clear to me... To change the speed you may increase the rate of substract and/or to decrease the rate of setTimeout function. Anyway, for the latest, for almost all the browsers the rate under 70 miliseconds will have no effect.

Anyway I guess that you should also include a clearTimeout() function when the opacity turns to 0, to avoid unecessary math underground calculation

window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);