CSS in IE8 not working - css

Question

This is doing my head in, please can someone help? I have made a site, works in Ie9 + 10 and all other browsers, but the animated menu doesnt work in IE8 and there are people using that to view the site..
here is the css:
.menu, .menu ul, .menu li, .menu a {
margin: 0;
padding: 0;
border: none;
outline: none;
}
.menu {
height: 40px;
width: 800px;
background: #f7d000;
background: -webkit-linear-gradient(top, #f7d000 0%,#f7d000 100%);
background: -moz-linear-gradient(top, #f7d000 0%,#f7d000100%);
background: -o-linear-gradient(top, #f7d000 0%,#f7d000 100%);
background: -ms-linear-gradient(top, #f7d000 0%,#f7d000 100%);
background: linear-gradient(top, #f7d000 0%,#f7d000 100%);
-webkit-border-radius: 0px;
-moz-border-radius: 0px;
border-radius: 0px;
}
.menu li {
position: relative;
list-style: none;
float: left;
display: block;
height: 50px;
}
.menu li a {
display: block;
padding: 0 14px;
margin: 5px 0;
line-height: 28px;
text-decoration: none;
font-family: 'Titillium Web', sans-serif;
font-weight: bold;
font-size: 15px;
color: #000000;
-webkit-transition: color .2s ease-in-out;
-moz-transition: color .2s ease-in-out;
-o-transition: color .2s ease-in-out;
-ms-transition: color .2s ease-in-out;
transition: color .2s ease-in-out;
}
.menu li:first-child a {
border-left: none;
}
.menu li:last-child a {
border-right: none;
}
.menu li:hover > a {
color: #ffffff;
}
.menu ul {
position: absolute;
top: 40px;
left: 0;
z-index: 999;
opacity: 0;
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
background: #f7d000;
-webkit-border-radius: 0 0 5px 5px;
-moz-border-radius: 0 0 5px 5px;
border-radius: 0 0 5px 5px;
-webkit-transition: opacity .25s ease .1s;
-moz-transition: opacity .25s ease .1s;
-o-transition: opacity .25s ease .1s;
-ms-transition: opacity .25s ease .1s;
transition: opacity .25s ease .1s;
}
.menu li:hover > ul {
opacity: 1;
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
}
.menu ul li {
height: 0;
overflow: visible;
padding: 0;
-webkit-transition: height .25s ease .1s;
-moz-transition: height .25s ease .1s;
-o-transition: height .25s ease .1s;
-ms-transition: height .25s ease .1s;
transition: height .25s ease .1s;
}
.menu li:hover > ul li {
height: 36px;
overflow: visible;
padding: 0;
}
.menu ul li a {
width: 180px;
padding: 8px 10px;
margin: 0;
border: none;
border-bottom: 1px solid #f7d000;
}
.menu ul li:last-child a {
border: none;
}
The site is: www.softwaretestingawards.com any help would be appreciated!

Answer 1

IE8 does not support CSS3 animations.
See this reference:
http://caniuse.com/#search=css%20tran
You many want to consider using javascript animations, like jQuery.animate
http://api.jquery.com/animate/

Answer 2

The reason it won't work in Internet Explorer 8 is because it does not support CSS3 animations. I recommend you make a script to detect if Internet Explorer 8 is being used and, if it is, dynamically change the website so it doesn't have the fancy CSS3 animations.

Answer 3

to make work the css in IE8 you can try using PIE.htc, refere this site for solution and demos if you want http://css3pie.com/demos/, actually it worked for me :)