libs.js

ajax打造的动态计数器

/**
 * @author mooring
 * mysite: www.jcpan.com .still in process
 * please keep these comments if you want to use it addtionally.
 */
function _getObj(id)
{
	if ( document.getElementById ) 
	{
		return document.getElementById(id);
	}
	else if ( document.all ) 
	{
		return document.all[id];
	}
	else if ( document.layers ) 
	{
		return document.layers[id];
	}
	else 
	{
		return eval( id );
	}
}

function _setCookie( key , value , day )
{
	var d = new Date();
	d.setDate(d.getDate() + day);
	document.cookie =  key + "=" + value + "; expires=" + d.toGMTString();
}

function _getCookie(key)
{
	var cook = document.cookie;
	var pair = cook.split("; ");
	for(var i=0; i<pair.length; i++)
	{
		var tmp = pair[i].split("=");
		if(key == tmp[0])
		{
			return tmp[1];
			break;		
		}	
	}
	return false;
}

function xhr( method, url, para, callfunction )
{

	if ( method == null || method == undefined ||method == "undefined") 
	{
		method = "get";
	}
	if (url == null || url == undefined || url == "undefined" || url.length < 4) 
	{
		return false;
	}
	if (sycho == null || sycho == undefined || sycho == "undefined") 
	{
		sycho = true;
	}
	
	var ajax = null;
	var err = false;
	var sycho = true;
	
	try 
	{
		if ( typeof XMLHttpRequest != "undefined" ) 
		{
			ajax = new XMLHttpRequest();
		}
	} 
	catch (e) 
	{
		if ( typeof ActiveXObject != "undefined" ) 
		{
			try 
			{
				ajax = new ActiveXObject("MSXML2.XMLHTTP.6.0");
			} 
			catch (e) 
			{
				try 
				{
					ajax = new ActiveXObject("MSXML2.XMLHTTP.3.0");
				} 
				catch (e) 
				{
					try 
					{
						ajax = new ActiveXObject("MSXML.XMLHTTP")
					} 
					catch (e) 
					{
						try 
						{
							ajax = new ActiveXObject("Microsoft.XMLHTTP");
						} 
						catch (e) 
						{
							err = true;
							throw new Error("Your Browser does not support Ajax");
						}
					}
				}
			}
		}
	}
	
	if (!err) 
	{
		if (callfunction == null || callfunction == undefined || callfunction == "undefined") 
		{
			alert("Please input check your process function of the  xhr() fourth prameter ");
			return false;
		}
		else 
		{
			ajax.onreadystatechange = function()
			{
				if(ajax.readyState ==4 && ajax.status == 200)
				{
					callfunction(ajax.responseText);
				}
			};
		}
		
		if (method.toString().toLowerCase() == "post") 
		{
			ajax.open("POST", url, sycho);
			ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=utf-8");
			ajax.send(para);
		}
		else 
		{
			ajax.open("GET", url + "?" + para, sycho);
			ajax.send(null);
		}
	}
	else 
	{
		alert("Error Occours");
		return false;
	}
}

function PageCount()
{
	var x = window.location.pathname;
	var file = x.substr(x.lastIndexOf("/")+1,x.length);
	var proto = window.location.protocol;
	var pra = 'url=' + file ;
	
	this.Url = "";
	this.Method = "";
	
	this.setRequest = function(method,url)
	{
		this.Url = url;
		this.Method = method;
	};
	this.Function = "";
	this.SendRequest = function()
	{
		var tmp = _getCookie(file);
		if (file == tmp) 
		{
			pra += "&visited=1";
		}
		else
		{
			_setCookie(file, file, 1);
			pra += "&visited=0";
		}
		if(navigator.cookieEnabled)
		{
			pra += "&cookie=1";
		}
		else
		{
			pra += "&cookie=0";
		}
		//alert(pra);
		xhr(this.Method, this.Url, pra, this.Function);
	};

}