var curr_banner=0;
var t=5000;
var interv=null;

$(function(){	
	//$(".banner_switch div").css("width",$(document).width());		
	$(".banner_switch div:gt(0)").hide();
	$(".banner_switch>ul>li").eq(0).addClass("curr");
	interv=setTimeout("showBanner(1)",t);		
	
	//Number position
	$(".banner_switch > ul").css("right",parseInt(($(document).width()-960)/2)+"px");
	
	for(var i=0;i<$(".banner_switch>ul>li").size();i++){
		$(".banner_switch>ul>li").eq(i).attr("currId",i);	
	}
	$(".banner_switch>ul>li").click(function(){
		clearTimeout(interv);
		var currId=parseInt($(this).attr("currId"));				
		showBanner(currId);
	});
	
});

function showBanner(curr_id){
		curr_banner=curr_id;
		if(curr_banner>=$(".banner_switch > div").size()) curr_banner=0;
		$(".banner_switch div").fadeOut(1000).eq(curr_banner).fadeIn(1000);	
		$(".banner_switch>ul>li").eq(curr_banner).addClass("curr").siblings().removeClass("curr");
		curr_banner++;		
		interv=setTimeout("showBanner(curr_banner)",t);
	}


//ͼƬ´¦Àí
function correctPNG() 
{
for(var i=0; i<document.images.length; i++)
{
var img = document.images[i]
var imgName = img.src.toUpperCase()
if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
{
var imgID = (img.id) ? "id='" + img.id + "' " : ""
var imgClass = (img.className) ? "class='" + img.className + "' " : ""
var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
var imgStyle = "display:inline-block;" + img.style.cssText 
if (img.align == "left") imgStyle = "float:left;" + imgStyle
if (img.align == "right") imgStyle = "float:right;" + imgStyle
if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle 
var strNewHTML = "<span "+ imgID + imgClass + imgTitle + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";" + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" + "(src='" + img.src + "', sizingMethod='scale');\"></span>" 
img.outerHTML = strNewHTML
i = i-1
}
}
}
window.attachEvent("onload", correctPNG); // JavaScript Document