if(navigator.appVersion.charAt(0) >= 3) {
	var dlBtn = new Array();
	dlBtn[0] = new Image();
	dlBtn[0].src = "images/btn_pdfdl.gif";
	dlBtn[1] = new Image();
	dlBtn[1].src = "images/btn_pdfdl_over.gif";
}

function dlOver(nam, num) {
	if(navigator.appVersion.charAt(0) >= 3) {
		document.images[nam].src = dlBtn[num].src;
	}
}