function chgcolor(_obj) {
		            for (var i = 1; i <= color_num; i++) {
		                document.getElementById("color_" + i).className = "c_color";
		            }
		            _obj.className = "bc_color";
		            target_obj = document.getElementById("contentbox")
		            target_obj.style.background = _obj.style.backgroundColor;
		            writeCookie("mycol", _obj.style.backgroundColor, 24);
		        }
		        function chgfontcolor(_obj) {
		            for (var i = 1; i <= color_num; i++) {
		                document.getElementById("fontcolor_" + i).className = "c_color";
		            }
		            _obj.className = "bc_color";
		            target_obj = document.getElementById("content")
		            target_obj.style.color = _obj.style.backgroundColor;
		            writeCookie("myfontcol", _obj.style.backgroundColor, 24);
		        }
		        function chgfont(_size) {
		            document.getElementById('content').style.fontSize = _size + 'px';
		            writeCookie("myfont", _size, 24);
		        }
		        //дÈëcookie
		        function writeCookie(name, value, hours) {
		            var today = new Date();
		            var expire = new Date();
		            expire.setTime(today.getTime() + 3600000 * 3561 * 24 * hours);
		            document.cookie = name + '=' + escape(value) + ';path=/;expires=' + expire.toGMTString();
		        
		        }

		        //¶ÁÈ¡cookie
		        function readCookie(name) {
		            var cookieValue = "";
		            var search = name + "=";
		            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;
		                    cookieValue = unescape(document.cookie.substring(offset, end))
		                }
		            }
		            return cookieValue;
		        }
		        function loadSet() {
		            var tmpstr;
		            tmpstr = readCookie("mycol");

		            if (tmpstr != "") {
		                for (var i = 1; i < color_num; i++) {
		                    if (document.getElementById("color_" + i).style.backgroundColor == tmpstr) {
		                        document.getElementById("color_" + i).className = "bc_color";
		                        target_obj = document.getElementById("contentbox")
		                        target_obj.style.background = tmpstr;
		                    }
		                    else {
		                        document.getElementById("color_" + i).className = "c_color";
		                    }

		                }
		            }
		            tmpstr = readCookie("myfontcol");


		            if (tmpstr != "") {
		                for (var i = 1; i < color_num; i++) {
		                    if (document.getElementById("fontcolor_" + i).style.backgroundColor == tmpstr) {
		                        document.getElementById("fontcolor_" + i).className = "bc_color";
		                        target_obj = document.getElementById("content")
		                        target_obj.style.color = tmpstr;
		                    }
		                    else {
		                        document.getElementById("fontcolor_" + i).className = "c_color";
		                    }

		                }
		            }
		            tmpstr = readCookie("myfont");


		            if (tmpstr != "") {
		                document.getElementById('content').style.fontSize = tmpstr + 'px';
		            }


		        }

		        var delay = 50;
		        var maxOpacity = 50;
		        var timeer;
		        var stepOpacity = 10;
		        var target_obj;
		        var color_num = 5;
		        var speed = 5;
		        var currentpos = 1;
		        var timer;

		        function setSpeed() {
		            speed = parseInt(scrollspeed.value);
		            if (speed < 1 || speed > 10) {
		                speed = 5;
		                scrollspeed.value = 5;
		            }

		        }

		        function stopScroll() {
		            clearInterval(timer);
		        }

		        function beginScroll() {
		            timer = setInterval("scrolling()", 300 / speed);
		        }
		        /* for xhtml
		        function scrolling()
		        {
		        currentpos=document.body.scrollTop;
		        window.scroll(0,++currentpos);
		        if(currentpos!=document.body.scrollTop) clearInterval(timer);
		        }
		        */


		        function scrolling() {
		            currentpos = document.documentElement.scrollTop;
		            window.scroll(0, ++currentpos);
		            if (currentpos != document.documentElement.scrollTop) clearInterval(timer);
		        }