/* toggle() checks to see if
the images has already been faded
or not and sends the appropriate
variables to opacity(); */
function toggle(el,milli) {
// Get the opacity style
parameter from the image
var currOpacity = document.
getElementById(el).style.opacity;
if(currOpacity != 0) { // if not faded
fade(el, milli, 100, 0);
} else { // else the images is already faded
fade(el, milli, 0, 100);
}
}
/* changeOpacity() uses
three different opacity settings to
achieve a cross-browser
opacity changing function. This
function can also be used
to directly change the opacity
of an element. */
function changeOpacity(el,opacity) {
var image = document.getElementById(el);
// For Mozilla
image.style.MozOpacity = (opacity / 100);
// For IE
image.style.filter =
"alpha(opacity=" + opacity + ")";
// For others
image.style.opacity = (opacity / 100);
}
/* fade() will fade the image
in or out based on the starting
and ending opacity settings.
The speed of the fade is
determined by the variable
milli (total time of the fade
in milliseconds)*/
function fade(el,milli,start,end) {
var fadeTime = Math.round(milli/100);
var i = 0; // Fade Timer
// Fade in
if(start < end) {
for(j = start; j <= end; j++) {
// define the expression to be called in setTimeout()
var expr = "changeOpacity('" + el + "'," + j + ")";
var timeout = i * fadeTime;
// setTimeout will call 'expr' after 'timeout' milliseconds
setTimeout(expr,timeout);
i++;
}
}
// Fade out
else if(start > end) {
for(j = start; j >= end; j--) {
var expr = "changeOpacity('" + el + "'," + j + ")";
var timeout = i * fadeTime;
setTimeout(expr,timeout);
i++;
}
}
}
}
-->
New blog !
Assalamualaikum ..
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