cross browser (IE) animation problems

[dudeamisgriff]

I'm attempting to move a div to the right, and at the same time create a frame of animation. It works fine in Firefox, but when I try it in IE it skips all the frames except the final one, creating a blinking frame every 35px (7 frames, interval = 5). How do I do this in IE?

function GoRight()
{
Frame = 0;
moveright = setInterval(right, speed);
}



function right(){
		var Passable="t";
		var testx=0;
		var destx=x-interval;
		for (testx=0; testx<15;testx++){
			if (destx == NoRightx[testx] && y== NoRighty[testx])
			{
			var Passable="f";
			break;
			}
		}
		if (x>-1740 && Passable=="t"){
		x=x-interval;
		document.getElementById("map").style.left = x+'px';
		Frame++
		if (Frame == "7"){
		Frame="0"
		}
		document.getElementById("player").innerHTML= "<img src=\"http://i184.photobucket.com/albums/x276/dudeamis/walktestright" + Walk[Frame] + ".gif\">";
		}
			
}

function StopRight()
{
clearInterval(moveright);
document.getElementById("player").innerHTML= "<img src=\"graphics/walktestright01.gif\">";
}