var ie55="";
var agent=navigator.userAgent.toLowerCase();
if (document.all)
{
	var version=parseFloat(agent.substr(agent.indexOf("msie")+5,3));
	if (version>=5.5) ie55="yes";
}

var displaymode="2";
var autohidebox=["no",86400];		// 多少时间自动隐藏 （秒），这里不自动隐藏
var showonscroll="yes";
var enablefade="yes";
var IEfadelength=1;
var Mozfadedegree=0.05;
if (parseInt(displaymode)!=NaN)
	var random_num=Math.floor(Math.random()*displaymode);

function displayfadeinbox()
{
	var ie=document.all && !window.opera;
	var dom=document.getElementById;
	iebody=(document.compatMode=="CSS1Compat")? document.documentElement:document.body;
	objref=(dom)? document.getElementById("fadeinbox"):document.all.fadeinbox;
	var scroll_top=(ie)? iebody.scrollTop:window.pageYOffset;
	var docwidth=(ie)? iebody.clientWidth:window.innerWidth;
	docheight=(ie)? iebody.clientHeight: window.innerHeight;
	var objwidth=objref.offsetWidth;
	objheight=objref.offsetHeight;
	//objref.style.left=docwidth/2-objwidth/2+"px";
	//objref.style.top=scroll_top+docheight/2-objheight/2+"px";
	// 固定显示位置
	objref.style.left=docwidth/2-objwidth/2+"px";
	objref.style.top= scroll_top+docheight/2-200+"px";
	if (showonscroll=="yes") showonscrollvar=setInterval("staticfadebox()",50);
	if (ie55=="yes" && enablefade=="yes" && objref.filters)
	{
		eval(objref.filters[0].duration=IEfadelength);
		eval(objref.filters[0].Apply());
		eval(objref.filters[0].Play());
	}
	objref.style.visibility="visible";
	if (objref.style.MozOpacity)
	{
		if (enablefade=="yes")
			mozfadevar=setInterval("mozfadefx()",90);
		else
		{
			objref.style.MozOpacity=1;
			controlledhidebox();
		}
	}
	else
		controlledhidebox()
}
function mozfadefx()
{
	if (parseFloat(objref.style.MozOpacity)<1)
		objref.style.MozOpacity=parseFloat(objref.style.MozOpacity)+Mozfadedegree;
	else
	{
		clearInterval(mozfadevar);
		controlledhidebox();
	}
}

function staticfadebox()
{
	var ie=document.all && !window.opera;
	var scroll_top=(ie)? iebody.scrollTop:window.pageYOffset;
	//objref.style.top=scroll_top+docheight/2-objheight/2+"px";
	// 固定显示位置
	objref.style.top=scroll_top+docheight/2-200+"px";
}

function hidefadebox()
{
	try
	{
		objref.style.visibility="hidden";
		if (typeof showonscrollvar!="undefined")
			clearInterval(showonscrollvar);
	}
	catch(e){}
}

function controlledhidebox()
{
	if (autohidebox[0]=="yes")
	{
		var delayvar=(enablefade=="yes" && objref.filters)? (autohidebox[1]+objref.filters[0].duration)*1000:autohidebox[1]*1000;
		setTimeout("hidefadebox()",delayvar);
	}
}

function initfunction(action,id,parameters)
{
	setTimeout("displayfadeinbox()",100);
	GetAjaxInfo('/Programs/ajax.php',action,id,parameters);		// 调用ajax.php
}

function loadfadebox()
{
	if (displaymode=="oncepersession"  || displaymode=="always"  || parseInt(displaymode)!=NaN )
	{
		if (window.addEventListener)
			window.addEventListener("load",initfunction,false);
		else if (window.attachEvent)
			window.attachEvent("onload",initfunction);
		else if (document.getElementById)
			window.onload=initfunction;
	}
}