Changing opacity using setTimeout or setInterval

[Kong Chun Ho]

Hi,
My sctipt not work, it can't change opacity every 0.1 second!

function LiveSupport() {
var x = document.getElementById('c_cover');
var y = document.getElementById('c_popcontent');
var z;
var startOpacity = '0'; //int only
var endOpacity = '80'; //int only
var t = 0;
x.style.position = 'absolute';
x.style.top = '80px';
x.style.left = '50%';
x.style.marginLeft = '-325px';
x.style.background = '#000';
x.style.zIndex = '998';
x.style.height = '676px';
x.style.width = '650px';
x.style.opacity=startOpacity/100;
x.style.filter = "alpha(opacity=" + startOpacity + ")";
for (z=startOpacity; z!=endOpacity; z++) {
t++;
setTimeout(function () { setOpacity('c_cover', z); }, t+'0');
}
}

i have alerted t, it didn't change black(the element) when it alerted(1-79), when var t was 80, it changed to opacity 0.8!, so where is 0.01-0.79???

Thanks.

[Kong Chun Ho]

Any one have solution?

[omerbutt]

please paste your complete code along with the html if you want someone to look at it and advise nad you have an error change this line no 17
with this one

x.style.filter = "alpha(opacity= " +startOpacity + ")";

[Kong Chun Ho]

<div id = "contact">
<p class = "heading">Contact us if you have question or you have feedback to us</p>
<p class = "Subheading">Live support</p>
<?
$current = "http://messenger.services.live.com/users/7a2131078a356d3@apps.messenger.live.com/presenceimage?mkt=zh-tw";
$current = file_get_contents($current);
$online = "http://www.wlmessenger.net/static/img/presence/Online.gif";
$online = file_get_contents($online);
$offline = "http://www.wlmessenger.net/static/img/presence/Offline.gif";
$offline = file_get_contents($offline);
if($current == $online) {
echo '<a href = "#" style = "color:#666;" onmouseover = "this.style.color = \'#999\'" onmouseout = "this.style.color = \'#666\';" onclick = "LiveSupport();">Live support is online, please click here to talk with our support live.</a>';
}else if($current == $offline) {
echo 'Live support is offline, please use helpdesk to contact support.';
}
?>
<p></p>
<p class = "Subheading">Helpdesk</p>
<p><a style = "color:#666;" onmouseover = "this.style.color = '#999'" onmouseout = "this.style.color = '#666';" href = "?a=h">Submit a ticket (Reply in 72 hour)</a></p>
<p><a style = "color:#666;" onmouseover = "this.style.color = '#999'" onmouseout = "this.style.color = '#666';" href = "?a=t">Track your submitted ticket</a></p>
<div id = "c_cover"></div>
<div id = "c_popcontent"></div>
</div>

[Kong Chun Ho]

add  ?
non breaking space?