function scrollTips(id, interval) {
    var tips = document.getElementById(id);
    removeWithoutElement(tips);
    var height = getPixcelValue(tips.style["height"]);
    var beforeLast = tips.childNodes.length - 1;
    var orgScrollTop = tips.scrollTop;
    if (orgScrollTop == (height * beforeLast)) {
        while (--beforeLast >= 0) {
            tips.appendChild(tips.removeChild(tips.firstChild));
        }
        orgScrollTop = 0;
        tips.scrollTop = 0;
    }
    var i = 1;
    var scrollDelay = window.setInterval(
        function() {
            tips.scrollTop = orgScrollTop + i;
            if (++i > height) {
                clearInterval(scrollDelay);
                scrollDelay = 0;
            }
        }
    , interval);
}

function getPixcelValue(pixcel) {
    var px = pixcel.indexOf("px");
    return (px == -1) ? pixcel: pixcel.substring(0, px);
}

function getElementById(id) {
    return $(id);
}

function removeWithoutElement(node) {
    var child = node.firstChild;
    while (child) {
        var nextSibling = child.nextSibling;
        if (child.nodeType != 1) {
            node.removeChild(child);
        }
        child = nextSibling;
    }
}


	function loadCssChage() {
		var cookie = readCookie("style");
		var title = cookie ? cookie : getPreferredStyleSheet();
		setActiveStyleSheet(title);
	}

	function unLoadCssChange() {
		var title = getActiveStyleSheet();
		createCookie("style", title, 365);
	}

	function setActiveStyleSheet(title) {
		var i, a, main;
		for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
			if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
				a.disabled = true;
				if(a.getAttribute("title") == title) {
					a.disabled = false;
				}
			}
		}
	}


function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}