var nindex=0;
var itemwidth=120;
var func ,opos=0,spos=0, tpos = 0, iduration = 20;  
var mtypes=0;

function bgmove(me)
{   
    var newindex=me.liindex;
    if(func!=null)
        cleartimeout(func);
    var om = document.getelementbyid("bgscrollx"),t=0, dtime=iduration;  
    opos=oindex*itemwidth;
    if(mtypes==0)
        tpos=newindex*itemwidth;
    else
        tpos=oindex*itemwidth;
    
    var changepos=tpos-parseint(om.style.left);
    spos=parseint(om.style.left);
    function _run()
    {   
        if(t<dtime)
        {   
            t++;
            om.style.left = math.ceil(tween.cubic.easeout(t,spos,changepos,dtime))+"px";  
            func=settimeout(_run, 30);   
        }
        else
        {   
            om.style.left = spos+changepos+"px";     
        }    
    }   
    _run();
} 
function bgchange()
{
    mtypes=0;
    bgmove(this);
    $(this).children(".nav_sub").css("display","block");
}
function bgreset()
{
    mtypes=1;
    bgmove(this);
    $(this).children(".nav_sub").css("display","none");
}

$(document).ready(function(){
    document.getelementbyid("bgscrollx").style.left=oindex*itemwidth+"px";
    document.getelementbyid("bgscrollx").style.display="block";
    var lilist=$("#navul li");
    for(var i=0;i<lilist.length-1;i++)
    {
        lilist[i].liindex=i;
        $(lilist[i]).bind("mouseenter",bgchange);
        $(lilist[i]).bind("mouseleave",bgreset);
    }
    
    //首页友情链接、集团公司
    $(".footer_sub").bind("mouseenter",function(){
        $(this).children("ul").css("display","block");
    });
    $(".footer_sub").bind("mouseleave",function(){
         $(this).children("ul").css("display","none");
    });
    //公司办公
    $(".oa").bind("mouseenter",function(){
        $(".ao_sub").css("display","block");
    });
    $(".oa").bind("mouseleave",function(){
         $(".ao_sub").css("display","none");
    });
});
var isscroll=false;
var scrollfun;
$(window).scroll(function(){
    if(scrollfun!=null)
        cleartimeout(scrollfun);
    isscroll=true;
    $("#divscroll").css("display","none");
    scrollfun=settimeout(showscrolltop,500);
});
$(window).resize(function(){
    showscrolltop();
});
function showscrolltop()
{
    if(document.getelementbyid("divscroll")!=null)
    {
        if($(document).scrolltop()>25&&$(window).width()>1042)
        {
            $("#divscroll").css({ "top":($(window).height()+$(document).scrolltop()-130)+"px","left":(($(window).width()-1002)/2+1002)+"px"});
            $("#divscroll").fadein(300);
        }
        else
            $("#divscroll").css("display","none");
    }
}