function sack(file) { this.xmlhttp = null; this.resetData = function() { this.method = "POST"; this.queryStringSeparator = "?"; this.argumentSeparator = "&"; this.URLString = ""; this.encodeURIString = true; this.execute = false; this.element = null; this.elementObj = null; this.requestFile = file; this.vars = new Object(); this.responseStatus = new Array(2);}; this.resetFunctions = function() { this.onLoading = function() { }; this.onLoaded = function() { }; this.onInteractive = function() { }; this.onCompletion = function() { }; this.onError = function() { }; this.onFail = function() { };}; this.reset = function() { this.resetFunctions(); this.resetData();}; this.createAJAX = function() { try { this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");} catch (e1) { try { this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");} catch (e2) { this.xmlhttp = null;}
}
if (! this.xmlhttp) { if (typeof XMLHttpRequest != "undefined") { this.xmlhttp = new XMLHttpRequest();} else { this.failed = true;}
}
}; this.setVar = function(name, value){ this.vars[name] = Array(value, false);}; this.encVar = function(name, value, returnvars) { if (true == returnvars) { return Array(encodeURIComponent(name), encodeURIComponent(value));} else { this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);}
}
this.processURLString = function(string, encode) { encoded = encodeURIComponent(this.argumentSeparator); regexp = new RegExp(this.argumentSeparator + "|" + encoded); varArray = string.split(regexp); for (i = 0; i < varArray.length; i++){ urlVars = varArray[i].split("="); if (true == encode){ this.encVar(urlVars[0], urlVars[1]);} else { this.setVar(urlVars[0], urlVars[1]);}
}
}
this.createURLString = function(urlstring) { if (this.encodeURIString && this.URLString.length) { this.processURLString(this.URLString, true);}
if (urlstring) { if (this.URLString.length) { this.URLString += this.argumentSeparator + urlstring;} else { this.URLString = urlstring;}
}
this.setVar("rndval", new Date().getTime()); urlstringtemp = new Array(); for (key in this.vars) { if (false == this.vars[key][1] && true == this.encodeURIString) { encoded = this.encVar(key, this.vars[key][0], true); delete this.vars[key]; this.vars[encoded[0]] = Array(encoded[1], true); key = encoded[0];}
urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];}
if (urlstring){ this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);} else { this.URLString += urlstringtemp.join(this.argumentSeparator);}
}
this.runResponse = function() { eval(this.response);}
this.runAJAX = function(urlstring) { if (this.failed) { this.onFail();} else { this.createURLString(urlstring); if (this.element) { this.elementObj = document.getElementById(this.element);}
if (this.xmlhttp) { var self = this; if (this.method == "GET") { totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString; this.xmlhttp.open(this.method, totalurlstring, true);} else { this.xmlhttp.open(this.method, this.requestFile, true); try { this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
} catch (e) { }
}
this.xmlhttp.onreadystatechange = function() { switch (self.xmlhttp.readyState) { case 1:
self.onLoading(); break; case 2:
self.onLoaded(); break; case 3:
self.onInteractive(); break; case 4:
self.response = self.xmlhttp.responseText; self.responseXML = self.xmlhttp.responseXML; self.responseStatus[0] = self.xmlhttp.status; self.responseStatus[1] = self.xmlhttp.statusText; if (self.execute) { self.runResponse();}
if (self.elementObj) { elemNodeName = self.elementObj.nodeName; elemNodeName.toLowerCase(); if (elemNodeName == "input" || elemNodeName == "select" || elemNodeName == "option" || elemNodeName == "textarea") { self.elementObj.value = self.response;} else { self.elementObj.innerHTML = self.response;}
}
if (self.responseStatus[0] == "200") { self.onCompletion();} else { self.onError();}
self.URLString = ""; break;}
}; this.xmlhttp.send(this.URLString);}
}
}; this.reset(); this.createAJAX();}