function setCookie(name, value) {
	try {
		var argv = setCookie.arguments;
		var argc = setCookie.arguments.length;
		var expires = (argc > 2) ? argv[2] : null;
		if(expires!=null) {
			var LargeExpDate = new Date ();
			LargeExpDate.setTime(LargeExpDate.getTime() + (expires*1000*3600*24));
		}
		document.cookie = name + "=" + escape (value)+((expires == null) ? "" : ("; expires=" +LargeExpDate.toGMTString()));
		return true;
	}catch(e) {
		return false;
	}
}

function getCookie(Name) {
	var search = Name + "=";
	var returnvalue = "";
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search);
		if (offset != -1) { 
			offset += search.length;
			end = document.cookie.indexOf(";", offset); 
			if (end == -1)
				end = document.cookie.length;
			returnvalue = unescape(document.cookie.substring(offset,end));

		}
	}

	return returnvalue;
}

    function changeStyle(color) {
		var purple_dark = "#F9E8F8";
		var purple_light = "#FDF6FD";
        var orange_dark = "#FFEFCE";
        var orange_light = "#FEFAEF";
        var blue_dark = "#E2F4FF";
        var blue_light = "#EBF8FF";
        var grey_dark = "#F2F2F2";
        var grey_light = "#F6F6F6";

        var top_banner = (document.all) ? document.styleSheets[1].rules[0] : document.styleSheets[1].cssRules[0];
        var leftnav_current = (document.all) ? document.styleSheets[1].rules[1] : document.styleSheets[1].cssRules[1];
        var leftnav_bg = (document.all) ? document.styleSheets[1].rules[4] : document.styleSheets[1].cssRules[4];
        var pagetype_bg = (document.all) ? document.styleSheets[1].rules[3] : document.styleSheets[1].cssRules[3];
        var page_bar_bg = (document.all) ? document.styleSheets[1].rules[2] : document.styleSheets[1].cssRules[2];
        var table_td_bg = (document.all) ? document.styleSheets[1].rules[5] : document.styleSheets[1].cssRules[5];
        var div_corner = (document.all) ? document.styleSheets[1].rules[6] : document.styleSheets[1].cssRules[6];

        if(color == "orange") {
            top_banner.style.background = "transparent url(../../images/bg/ystats_orange.png) repeat-x left -28px";
			leftnav_current.style.background = "transparent url(../../images/bg/ystats_orange.png) no-repeat scroll left top";
            leftnav_bg.style.backgroundColor = orange_light;
            pagetype_bg.style.backgroundColor = orange_dark;
            page_bar_bg.style.background = orange_dark+" none repeat scroll 0 50%";
            table_td_bg.style.backgroundColor = orange_light;
            div_corner.style.background = "transparent url(../../images/bg/ystats_orange.png) no-repeat -19px -113px";

        }else if(color == "purple") {
            top_banner.style.background = "transparent url(../../images/bg/ystats_purple.png) repeat-x left -28px";
			leftnav_current.style.background = "transparent url(../../images/bg/ystats_purple.png) no-repeat scroll left top";
            leftnav_bg.style.backgroundColor = purple_light;
            pagetype_bg.style.backgroundColor = purple_dark;
            page_bar_bg.style.background = purple_dark+" none repeat scroll 0 50%";
            table_td_bg.style.backgroundColor = purple_light;
            div_corner.style.background = "transparent url(../../images/bg/ystats_purple.png) no-repeat -19px -113px";

        }else if(color == "blue") {
            top_banner.style.background = "transparent url(../../images/bg/ystats_blue.png) repeat-x left -28px";
			leftnav_current.style.background = "transparent url(../../images/bg/ystats_blue.png) no-repeat scroll left top";
            leftnav_bg.style.backgroundColor = blue_light;
            pagetype_bg.style.backgroundColor = blue_dark;
            page_bar_bg.style.background = blue_dark+" none repeat scroll 0 50%";
            table_td_bg.style.backgroundColor = blue_light;
            div_corner.style.background = "transparent url(../../images/bg/ystats_blue.png) no-repeat -19px -113px";

        }else if(color=="grey" || color=="") {  // default grey
            top_banner.style.background = "transparent url(../../images/bg/ystats.png) repeat-x left -28px";
            leftnav_current.style.background = "transparent url(../../images/bg/ystats.png) no-repeat scroll left top";
            leftnav_bg.style.backgroundColor = grey_light;
            pagetype_bg.style.backgroundColor = grey_dark;
            page_bar_bg.style.background = grey_dark+" none repeat scroll 0 50%";
            table_td_bg.style.backgroundColor = "#FFFFCC";
            div_corner.style.background = "transparent url(../../images/bg/ystats.png) no-repeat -19px -113px";
        }
    }

    function styleBtnClick(selcolor) {
        var ul = document.getElementById("changeStyleList");

        var cookie_color = getCookie("_ystat_style");
        if(selcolor!=cookie_color) {
            setCookie("_ystat_style", selcolor, 30);
            changeStyle(selcolor);
        }

        var lis = ul.childNodes;
        var ln = lis.length;
        for(i=0; i<ln; i++) {
            if(lis[i].nodeType==1) {
                var color = lis[i].getAttribute("color");
                if( color == selcolor ) {
                    lis[i].childNodes[0].src = "./images/theme/"+color+"_ok.gif";
                }else {
                    lis[i].childNodes[0].src = "./images/theme/"+color+".gif";
                }
            }
        }
    }

    (function() {
        var cur_color = getCookie("_ystat_style");
        if(cur_color=='') {
            setCookie("_ystat_style", "grey", 30);
        }else if(cur_color=='grey') {
            return;
        }else {
            changeStyle(cur_color);
        }
     }());