var Request = new Object();

Request.send = function(url, method, callback, data, urlencoded) {
	var req;	
	if (window.XMLHttpRequest) {
		req = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		req = new ActiveXObject("Microsoft.XMLHTTP");
	}	
	req.onreadystatechange = function() {
		if (req.readyState == 4) {
			if (req.status < 400) {				
				(method=="POST") ? callback(req) : callback(req,data);
			} else {
				alert("There was a problem loading data :\n" + req.status+ "/" + req.statusText);
			}
		}
	}
	
	if (method=="POST") {
		req.open("POST", url, true);
		if (urlencoded) req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');		
		req.send(data);
	} else {	
		req.open("GET", url, true);
		req.send(null);
	}
	
	return req;
}

Request.sendRawPOST = function(url, data, callback) {
	Request.send(url, "POST", callback, data, false);
}
Request.sendPOST = function(url, data, callback) {
	Request.send(url, "POST", callback, data, true);
}
Request.sendGET = function(url, callback, args) {
	return Request.send(url, "GET", callback, args);
}

function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }

  return elements;
}

if (!window.Element) {
  var Element = new Object();
}

Object.extend = function(destination, source) {
  for (property in source) {
    destination[property] = source[property];
  }
  return destination;
}

Object.extend(Element, {
  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
  }
});

function findPosX(obj) {
	var curleft = 0;
	if (obj && obj.offsetParent) {
		while (obj.offsetParent) {
			curleft += obj.offsetLeft;
			obj = obj.offsetParent;
		}
	} else if (obj && obj.x) curleft += obj.x;
	return curleft;
}

function findPosY(obj) {
	var curtop = 0;
	if (obj && obj.offsetParent) {
		while (obj.offsetParent) {
			curtop += obj.offsetTop;
			obj = obj.offsetParent;
		}
	} else if (obj && obj.y) curtop += obj.y;
	return curtop;
}

function KeyDown(event){
	if (event.keyCode == 13 || event.keyCode==0){
		event.returnValue=false;
		event.cancel = true;
		showPlacesToAdded('search');
	}
}

function convertTextToHTML(s) {
	s = s.replace(/\&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/\n/g, "<br>");
	return s;
}

function convertHTMLToText(s) {
	s = s.replace(/&amp;/g,"&").replace(/&lt;/g,"<").replace(/&gt;/g,">").replace(/<br>/g,"\n");
	return s;
}

function trim(s) {
  while (s.substring(0,1) == ' ') {
    s = s.substring(1,s.length);
  }
  while (s.substring(s.length-1,s.length) == ' ') {
    s = s.substring(0,s.length-1);
  }
  return s;
}

function isNull(s){
	if(trim(s)== ''){
    	return true;
	}else{
		return false;
	}
}

String.prototype.getLength=function() {
	var i,sum=0;
	for(i=0;i<this.length;i++) {
		if ((this.charCodeAt(i)>=0) && (this.charCodeAt(i)<=255)){
			sum++;		
		}else{
			sum+=2;
		}
	}
	return sum;
}

function isInteger(value){  	  
	var pattern = /^(\d|(-\d))\d*$/;	
	if (!pattern.test(value)) {
		return false;
	}else{
		return true;
	}
}


function myAddPanel(title, url, desc) {
    if ((typeof window.sidebar == 'object') &&
		(typeof window.sidebar.addPanel == 'function'))
        window.sidebar.addPanel(title, url, desc);
    else
        window.external.AddFavorite(url, title);
}


var m_Cookie = null;
function getCookie(name) {
    if (!m_Cookie) {
        m_Cookie = [];
        var cs = document.cookie.split('; ');
        for (var i = 0; i < cs.length; i++) {
            var c = cs[i].split('=');
            var name1 = c[0];
            var value1 = c[1];
            m_Cookie[m_Cookie.length] = { 'name': name1, 'value': value1 };
        }
    }

    var i = 0;
    var value;
    while (i < m_Cookie.length) {
        if (m_Cookie[i].name == name) {
            value = m_Cookie[i].value;
            break;
        }
        i++;
    }

    return value;
}
function setCookie(name, value, expires) {
    document.cookie = name + '=' + encodeURIComponent(value) + ";path=/" +
     (expires ? ';expires=' + expires : '');
}

var m_Request = null;
function getRequest(name) {
    if (!m_Request) {
        m_Request = [];
        if (document.URL.indexOf('?') >= 0) {
            var queryString = document.URL.substr(document.URL.indexOf('?') + 1);
            var qs = queryString.split('&');
            for (var i = 0; i < qs.length; i++) {
                var q = qs[i].split('=');
                var name1 = q[0];
                var value1 = q[1];
                m_Request[m_Request.length] = { 'name': name1, 'value': value1 };
            }
        }
    }
    
    var i = 0;
    var value;
    while (i < m_Request.length) {
        if (m_Request[i].name.toLowerCase() == name.toLowerCase()) {
            value = m_Request[i].value;
            break;
        }
        i++;
    }

    return value;
}



//记录浏览过的页面
function SaveViewPages() {
    var viewpages = LoadViewPages();
    if (viewpages.length > 5) {
        var i = 0;
        while (i < viewpages.length - 2) {
            viewpages[i] = viewpages[i + 2];
            viewpages[i + 1] = viewpages[i + 3];
            i += 2;
        }
        viewpages.length = 4
    }

    var viewed = false;
    var i = 0;
    while (i < viewpages.length) {
        if (viewpages[i] == document.URL) {
            viewed = true;
            break;
        }
        i += 2;
    }

    if (!viewed) {
        viewpages[viewpages.length] = document.URL;
        viewpages[viewpages.length] = document.title;
        viewpage_cookie_value = '';
        var i = 0;
        while (i < viewpages.length) {
            viewpage_cookie_value += viewpages[i] + '*';
            i++;
        }
        viewpage_cookie_value = escape(viewpage_cookie_value.substr(0, viewpage_cookie_value.length - 1));
        var d = new Date();
        setCookie('viewpages', viewpage_cookie_value, new Date(d.getYear() + 1, d.getMonth(), d.getDate()).toUTCString());
    }
}


function LoadViewPages() {
    var viewpages = [];
    var viewpage_cookie_value = getCookie('viewpages');
    if (viewpage_cookie_value) {
        viewpages = unescape(unescape(viewpage_cookie_value)).split('*');
        if (viewpages.length % 2 != 0)
            viewpages.length = 0;
    }
    return viewpages;
}