var speed = 3000;//主题切换速度
var speed3 = 400;//背景移动速度
var bgmar; 
$(document).ready(function(){
	var h=document.documentelement.clientheight;
	bgmar = setinterval("dochange(0)",speed);
	$("#hd").css("left",$(window).width()/2-80);
});
 
$(window).scroll(function() {
	resizediv()
});

function resizediv()
{
	var h = document.documentelement.clientheight;
	var scrolltops = document.documentelement.scrolltop;
}
 

var tindex=1;
var showindex=0;
var currentindex=1;
//切换操作
function dochange(index){
	if(index==0){
		tindex++;
	}else{
		tindex = index;
		clearinterval(bgmar);
		changetheme(tindex);	
		bgmar = setinterval("dochange(0)",speed);
		return;
	}
	if(tindex>$(".bg22").length)
	{
		tindex=1;
	}
	changetheme(tindex);
}
//切换操作执行
function changetheme(index){
	$(".btn").removeclass('btn_select');
	$("#btn"+index).addclass('btn_select');
	var w1 = $(window).width();
	var w2 = w1-w1*2;
	$("#bg"+index).stop();
	$("#bg"+currentindex).stop();
	
	if(currentindex<index){
		$("#bg"+index).show().css("left",w1-20).animate({ left:0},speed3,null,function(){
		});
		$("#bg"+currentindex).animate({ left:w2},speed3,null,function(){$(this).hide();});
	}
	if(currentindex>index){
		$("#bg"+index).show().css("left",w2+20).animate({ left:0},speed3,null,function(){
		});
		$("#bg"+currentindex).animate({ left:w1},speed3,null,function(){$(this).hide();});
	}
	currentindex = index;
}