if(!window.Msn) {
	window.Msn = {};
}

Msn.Slideshow = new function() {
	var me = this;	var se = null;	var t = null;
	var dly = 2;	var tm = 1;	var st = 0;
	var w = window;
	if(w.ipFadeSecs) {
		tm=w.ipFadeSecs;
	}
	if(w.ipDelaySecs) {
		dly=w.ipDelaySecs;
	}
	
	function E(i) {
		return document.getElementById(i);
	}
	
	function init() {
		var ss=E("defhotA");
		if(ss) {
			if(ss.style&&ss.style.filter==="") {
				ss.style.filter = "progid:DXImageTransform.Microsoft.Fade()";
			}
			se=fc(ss);
			if(se) {
				var c = 1;	var n = ns(se);
				while(n!=se) {
					++c;n.style.display = "none";
					n = ns(n);
				}
				if(w.attachEvent) {
					w.attachEvent("onunload",me.ondestroy);
				}
				if(c>1) {
					ss.onmousemove = pause;
					ss.onfilterchange = trans;
					hb();
					res();
				}
			}
		}
	}
	
	function uninit() {
		if(w.detachEvent) {
			w.detachEvent("onunload",me.ondestroy);
		}
		var sl=E("defhotA");
		if(sl) {
			sl.onfilterchange=null;sl.onmousemove=null;
		}
		hb(true);
	}
	
	this.ondestroy = function() {
		uninit();
	};

	function hb(u) {
		var f=E("flipper");
		if(f) {
			var as=f.getElementsByTagName("a");
			for(var n=0;n<as.length;++n) {
				var a=as[n];
				switch(n) {
					case 0:a.onclick=(u?null:fp);
					a.style.visibility="visible";
					break;
					case 1:a.onclick=(u?null:fn);
					a.style.visibility="visible";
					break;
				}
			}
		}
	}
	
	function hide() {
		st=1;
		var sl=E("defhotA");
		if(sl&&sl.filters&&sl.filters[0]) {
			f(sl,0);
		} else {
			h();
			t=w.setTimeout(trans,tm);	/* 两张图交替的间隔 */
		}
	}
	
	function trans() {
		if(st==1) {
			st=2;se=ns(se);
			var sl=E("defhotA");
			if(sl&&sl.filters&&sl.filters[0]) {
				f(sl,1);
			} else {
				s();res(tm);
			}
		} else if(st==2) {
			res();
		}
	}
	
	function res(ex) {
		st=0;
		t=w.setTimeout(hide,(dly+(ex?ex:0))*500);	/* 每张图显示的时间 */
	}
	
	function ct() {
		w.clearTimeout(t);
		return(se!==null);
	}
	
	function f(sl,v) {
		sl.filters[0].apply();
		(v?s():h());
		sl.filters[0].play(duration=tm);
	}
	
	function s() {
		se.style.display="block";
	}
	
	function h() {
		se.style.display="none";
	}
	
	function pause() {
		if(!st) {
			if(ct()) {
				res();
			}
		}
	}
	
	function fc(p) {
		var n=p.firstChild;
		while(n&&(n.nodeType!=1||ie(n))) {
			n=n.nextSibling;
		}
		return n;
	}
	
	function lc(p) {
		var n=p.lastChild;
		while(n&&(n.nodeType!=1||ie(n))) {
			n=n.previousSibling;
		}
		return n;
	}
	
	function pe(n) {
		var p=n.parentNode;
		while(p&&p.nodeType!=1) {
			p=p.parentNode;
		}
		return p;
	}
	
	function ns(n) {
		var s=n.nextSibling;
		while(s&&(s.nodeType!=1||ie(s))) {
			s=s.nextSibling;
		}
		if(!s) {
			s=fc(pe(n));
		}
		return s;
	}
	
	function ps(n) {
		var s=n.previousSibling;
		while(s&&(s.nodeType!=1||ie(s))) {
			s=s.previousSibling;
		}
		if(!s) {
			s=lc(pe(n));
		}
		return s;
	}
	
	function ie(n) {
		for(var i=0;i<n.childNodes.length;++i) {
			if(n.childNodes[i].nodeType==1) {
				return false;
			}
		}
		return true;
	}
	
	function fp() {
		return flip(1);
	}
	
	function fn() {
		return flip();
	}
	
	function flip(r) {
		if(!st) {
			if(ct()) {
				h();
				se=(r?ps(se):ns(se));
				s();
				res();
			}
		}
		if(w.event) {
			w.event.returnValue=false;
		}
		return false;
	}
	
	init();
};