var wDspLayer = 10;
var ChkSite = "";

//********************************
// page load
//********************************
$(function() {

    $("a.rss_list").css("opacity","0.1");

    $("a.rss_list").jFade({
        trigger: "mouseover",
        property: 'background',
        start: '9D9D9D',
        end: '000000',
        steps: 25,
        duration: 30
    }).jFade({
        trigger: "mouseout",
        property: 'background',
        start: '363636',
        end: '1C1C1C',
        steps: 25,
        duration: 30
    });

    $("ul#filter li").hover(function(){
        if( ChkSite == "" ){
            if( this.id == "site_all" ){
                $("a.rss_list").css("opacity","1");
            }else{
                $("a.rss_list").css("opacity","0.1");
                $("a."+this.id).css("opacity","1");
            }
        }
    }, function(){
        if( ChkSite == "" ){
            $("a.rss_list").css("opacity","0.1");
        }
    });

    var wPos = "";

    $("ul#filter li").click(function(){
        if( ChkSite == this.id ){
            $("ul#filter li#"+ChkSite+" a").css("background-position","0px "+wPos);
            $("a.rss_list").css("opacity","0.1");
            ChkSite = "";
        }else{
            if( ChkSite != "" ){
                $("ul#filter li#"+ChkSite+" a").css("background-position","0px "+wPos);
            }
            if( this.id == "site_all" ){
                $("a.rss_list").css("opacity","1");
            }else{
                $("a.rss_list").css("opacity","0.1");
                $("a."+this.id).css("opacity","1");
            }
            if($.browser.msie){
                wPos = $("ul#filter li#"+this.id+" a").css("background-position-y");
            }else{
                wPos = $("ul#filter li#"+this.id+" a").css("background-position").substr(3);
            }
            $("ul#filter li#"+this.id+" a").css("background-position","-47px "+wPos);
            ChkSite = this.id;
        }
    });

});


//********************************
// page top
//********************************
function slowdownScroll() {

    var sctop;

    if(navigator.appName == "Microsoft Internet Explorer" && document.compatMode == "CSS1Compat") {
        sctop = document.body.parentNode.scrollTop;
    }else if(window.pageYOffset){
        sctop = window.pageYOffset;
    } else {
        sctop = document.body.scrollTop;
    }

    if(sctop){
        var  scup = Math.ceil(sctop*0.5);
        scrollBy(0,-scup);
        if (sctop-scup) setTimeout("slowdownScroll()",15);
    }
}