/* Ajax class */

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.vars2 = new Array();
  	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.vars2[name] = value;
  };
      
  this.getVar = function(name) {
    if(this.vars2[name]==undefined) return ""; else return this.vars2[name];
  };
 
  this.encVar = function(name, value, returnvars) {
  	if (true == returnvars) {
  		return Array(encodeURIComponent(name), encodeURIComponent(value));
  	} else {
  		this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);
      return false;
  	}
  }
 
  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;
  		}
  	}
 
  	// prevents caching of URLString
  	this.setVar("rndval", new Date().getTime());
 
  	var urlstringtemp = new Array();
  	for (key in this.vars) {
  		if (false == this.vars[key][1] && true == this.encodeURIString) {
  			var 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.onError('Unable to open xmlHTTP'+e );
                                    exit;
                                }
  			}
 
  			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("Error: "+ self.responseStatus[0]+"<br>"+self.responseStatus[1]);
  						}
 
  						self.URLString = "";
  						break;
  				}
  			};
 
  			this.xmlhttp.send(this.URLString);
  		}
  	}
  };
 
  this.reset();
  this.createAJAX();

	this.sethtml = function(div) {
           document.getElementById(div).innerHTML = this.response;
	   var search = this.response; 
	   var script; 
	    
	   var is_singleq = 0;var singleq = "'"; 
	   var is_doubleq = 0;var doubleq = '"'; 
	   var is_escaped = 0;var escap = "\\"; 
	   var layer = 0; 
	          
	   while( script = search.match(/(<script[^>]+javascript[^>]+>\s*(<!--)?)/)) { 
	      search = search.substr(search.indexOf(RegExp.$1) + RegExp.$1.length); 
	      if (!(endscript = search.match(/((-->)?\s*<\/script>)/))) break; 
	      block = search.substr(0, search.indexOf(RegExp.$1)); 
	      search = search.substring(block.length + RegExp.$1.length); 
	       
	      while(func = block.match(/(function(.+?)\((.*?)\)\s*\{)/)) { 
	         eval(block.substr(0,block.indexOf(RegExp.$1))); 
	         // for evaluating non functions 
	          
	         block = block.substr(block.indexOf(RegExp.$1) + RegExp.$1.length); 
	         name = RegExp.$2; 
	         param = RegExp.$3; 
	          
	         is_singleq = 0; 
	         is_doubleq = 0; 
	         is_escaped = 0; 
	         layer = 0; 
	          
	          
	         for(i=0;i<block.length;i++) { 
	            c = block.substr(i,1); 
	             
	            if ((is_singleq || is_doubleq) && is_escaped) { 
	               is_escaped = 0; 
	            } else if (!is_doubleq && (c==singleq)) { 
	               is_singleq = !is_singleq; 
	            } else if (!is_singleq && (c==doubleq)) { 
	               is_doubleq = !is_doubleq; 
	            } else if ((is_singleq || is_doubleq) && (c==escap)) { 
	               is_escaped = 1; 
	            } else if ( c=="{") { 
	               layer++; 
	            } else if ( c=="}") { 
	               if ( layer==0 ) { 
	                  break; 
	               } 
	               layer--; 
	            } 
	         } 
	          
	         code = block.substr(0,i-1); 
	         block = block.substr(i +1); 
	          
	         code = code.replace(/\n/g, '\\n'); 
	         code = code.replace(/\r/g, '\\r'); 
	         code = code.replace(/'/g,"\\'"); 
	          
	         eval(name + " = new Function('"+param+"','"+code+"');"); 
	      } 
	      eval(block); 
				// for evaluating non functions 
	   } 
 		
	};
	
		this.sethtml2 = function(div) {
		 document.getElementById(div).innerHTML = this.response;
	   var search = this.response;
	   var script;var endscript;
	   var start;var end;var block;
	   var name;var param;
		 var func;
		  
	   var is_singleq = 0;var singleq = "'"; 
	   var is_doubleq = 0;var doubleq = '"'; 
	   var is_escaped = 0;var escap = "\\"; 
	   var layer = 0; 
	          
	   while( script = search.match(/(<script[^>]+javascript[^>]+>[\s\n\r]*(<!--)?)/)) {
		 		start =  search.indexOf(script[0]);
	      search = search.substr(start + script[0].length); 
	      if (!(endscript = search.match(/((-->)?\s*<\/script>)/))) break;
				end = search.indexOf(endscript[0]);
	      block = search.substr(0, end); 
	      search = search.substring(block.length + endscript[0].length); 
	       
 				while(func = block.match(/(function(.s?)\((.*?)\)\s*\{)/)) { 
	         name = func[2]; 
	         param = func[3];
	         start = block.indexOf(func[0])
					 eval(block.substr(0,start)); 
	         // for evaluating non functions 
	          
	         block = block.substr(start + func[0].length); 

	          
	         is_singleq = 0; 
	         is_doubleq = 0; 
	         is_escaped = 0; 
	         layer = 0; 
	          
	          
	         for(i=0;i<block.length;i++) { 
	            c = block.substr(i,1); 
	             
	            if ((is_singleq || is_doubleq) && is_escaped) { 
	               is_escaped = 0; 
	            } else if (!is_doubleq && (c==singleq)) { 
	               is_singleq = !is_singleq; 
	            } else if (!is_singleq && (c==doubleq)) { 
	               is_doubleq = !is_doubleq; 
	            } else if ((is_singleq || is_doubleq) && (c==escap)) { 
	               is_escaped = 1; 
	            } else if ( c=="{") { 
	               layer++; 
	            } else if ( c=="}") { 
	               if ( layer==0 ) { 
	                  break; 
	               } 
	               layer--; 
	            } 
	         } 
	          
	         code = block.substr(0,i-1); 
	         block = block.substr(i +1); 
	          
	         code = code.replace(/\n/g, '\\n'); 
	         code = code.replace(/\r/g, '\\r'); 
	         code = code.replace(/'/g,"\\'"); 
	          
	         eval(name + " = new Function('"+param+"','"+code+"');"); 
	      }
	      
	      
	      
	      eval(block); 
				// for evaluating non functions 
	   }
	};
	

};