function switchPic(screen) {
	screen = screen>=MaxScreen?0:screen;
	for (i=0;i<MaxScreen;i++) 
    $("#Switch_"+i).hide();
	$("#Switch_"+screen).show();
	showSwitchNav(screen);
	CurScreen = screen  ;
}
function showSwitchNav(screen) {
	var NavStr = "" ;
	for (i=0;i<MaxScreen;i++) {
		if (i == screen) {
			NavStr += '<li onmouseover="pauseSwitch();" onmouseout="goonSwitch();"><a href="javascript://" target="_self" class="sel">'+(i+1)+'</a></li>' ;
		}
		else {
			NavStr += '<li onmouseover="pauseSwitch();" onmouseout="goonSwitch();" onclick="goManSwitch('+i+');"><a href="javascript://" target="_self">'+(i+1)+'</a></li>' ;
		}
	}
	$("#SwitchNav").html(NavStr);
}
function reSwitchPic() {
	refreshSwitchTimer = null;
	switchPic(CurScreen+1);
	refreshSwitchTimer = setTimeout('reSwitchPic();', spaceTime);
}
function pauseSwitch() {
	clearTimeout(refreshSwitchTimer);
}
function goonSwitch() {
	clearTimeout(refreshSwitchTimer);
	refreshSwitchTimer = setTimeout('reSwitchPic();', spaceTime);
}
function goManSwitch(index) {
	clearTimeout(refreshSwitchTimer);
	CurScreen = index - 1 ;
	reSwitchPic();
}