function imgHighlight(obj) {
	obj.style.Opacity=1;
	obj.style.MozOpacity=0.99;
	if(obj.filters) obj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=100)";
}

function imgRevert(obj) {
	obj.style.Opacity=0.5;
	obj.style.MozOpacity=0.5;
	if(obj.filters) obj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=50)";
}

function imgMatch(obj,newTarget) {
	objReplace = document.getElementById("imgMain");
	objReplace.src = newTarget;
	for(var j = 1; j <= 6; j++) {
		obj2 = document.getElementById("img" + j);
		if (obj2) imgRevert(obj2);				
	}
	imgHighlight(obj);
}