Mon slideshow me marche pas sur IE

salut
mon slideshow marche pas sur IE
voici le code html

	<div class="slideshow-container">

			<div class="mySlides fade">
				<img src="../fichiers/flyer.jpg" width="100%" height="300" alt="banniere">
			</div>

			<div class="mySlides fade">
				<img src="../fichiers/concours.jpg" width="100%" height="300" alt="banniere">
			</div>

			<div class="mySlides fade">
				<img src="../fichiers/intello.png" width="100%" height="300" alt="banniere">
			</div>

		</div>
		
		<div style="text-align:center">;
			<span class="dot"></span>
			<span class="dot"></span>
			<span class="dot"></span>
		</div>

CSS

/* Slideshow container */
.slideshow-container {
}


/* The dots/bullets/indicators */
.dot {
	text-align:center;
  height: 13px;
  width: 13px;
  margin: 0 0px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  -webkit-transition: background-color 0.6s ease;
  -moz-transition: background-color 0.6s ease;
  transition: background-color 0.6s ease;
}

.active {
  background-color: #717171;
}

/* Fading animation */
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 1.5s;
  -moz-animation-name: fade;
  -moz-animation-duration: 1.5s;
  animation-name: fade;
  animation-duration: 1.5s;
}

@-webkit-keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

@-moz-keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

@keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
  .text {font-size: 11px}
}

JAVASCRIPT

<script>
			var slideIndex = 0;
			showSlides();

				function showSlides() 
				{
					var i;
					var slides = document.getElementsByClassName("mySlides");
					var dots = document.getElementsByClassName("dot");
					for (i = 0; i < slides.length; i++) 
					{
						slides[i].style.display = "none";
					}
						slideIndex++;
					if (slideIndex> slides.length) {slideIndex = 1}
						for (i = 0; i < dots.length; i++) 
						{
							dots[i].className = dots[i].className.replace(" active", "");
						}
						slides[slideIndex-1].style.display = "block";
						dots[slideIndex-1].className += " active";
							setTimeout(showSlides, 4000); // Change image every 2 seconds
				}
		</script>

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