<script language="javascript">
var PicArray = new Array("A.swf", "B.swf");
var today = new Date();
var Hour = today.getHours();
var ShowPic = (Hour >= 6 && Hour < 18 ) ? PicArray[0] : PicArray[1];
document.write('<embed src="' + ShowPic + '"width=1000 height=206>');
</script></embed>