function AjaxCall(url,handleResponse,param){
    var isXML=false;//false:html or true:xml
    var isCache=false;//false:no-cache or true:cache
    var method="GET";//GET or POST
    if(param){
       re = / /g; 
       param=param.replace(re, "");
       var tmp=param.split(",");//extends param array
       for(var i=0;i<tmp.length;i++){
              var pa=tmp[i].substr(0,3);
              var ct=tmp[i].split("=")[1];
              switch (pa){
                  case "isX":
                  if(ct=="true"){
                      isXML= true; 
                  }else{
                      isXML= false; 
                  }
                  break;
                  case "isC":
                  if(ct=="true"){
                      isCache= true; 
                  }else{
                      isCache= false; 
                  }
                  break;
                  case "met":
                  method=ct;
                  break;
              }
       }    
    }
    if(!isCache){
        var t=new Date().getTime();
        if(url.indexOf("?")>0){
            url+="&t="+t;
        }else{
            url+="?t="+t;
        }
    }    
    var postdata=null;
    if(method=="POST"){
        purl=url.split("?");
        url=purl[0];
        postdata=purl[1];//must urlencoded first
    }
    RequestHTTP(url,handleResponse,method,isXML,postdata);
}

function AJAXForm(formID,handleResponse,gXML){
var isXML=false;//false:html or true:xml
if(gXML){
       re = / /g; 
       gXML=gXML.replace(re, "");
              var ct=gXML.split("=")[1];
                  if(ct=="true"){
                      isXML= true; 
                  }else{
                      isXML= false; 
                  }    
          }

var url=$(formID).action;
var data=getForm(formID);
RequestHTTP(url,handleResponse,"POST",isXML,data);
}

function getForm(theFormName){
  var form = document.forms[theFormName];
   if(typeof form.name == "undefined" || form.name=="")
       form = $(theFormName);

   var formData = "";
   var element;
   for (var i = 0; i < form.elements.length; i++) {
      element = form.elements[i];
      var type=element.type.toLowerCase();      
      if (type == "hidden" ||type == "text" || type == "password" || type == "textarea"){          
       formData += element.name + "=" + $U(element.value) + "&";
      }else if (element.type.indexOf("select") != -1) {
         for (var j = 0; j < element.options.length; j++) {
            if (element.options[j].selected == true) formData +=  element.name + "=" + $U(element.options[element.selectedIndex].value) + "&";
         }
      }
      else if (element.type == "checkbox") {
         if (element.checked) formData += element.name + "=" + $U(element.value) + "&";
      }
      else if (element.type == "radio") {
          if (element.checked == true) formData += element.name + "=" + $U(element.value) + "&";
      }
   }
   return formData.substring(0, formData.length - 1);
}

function RequestHTTP(burl,rdRandleResponse,bmethod,bXML,Formdata){
var http_request = false;
function doHttpRequest()
{    
       if (window.XMLHttpRequest) {
            http_request = new XMLHttpRequest();
            if (http_request.overrideMimeType) {
                http_request.overrideMimeType('text/xml');
            }
        } else if (window.ActiveXObject) {
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }
        if (!http_request) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }

    http_request.onreadystatechange=handleStateChange;    
    http_request.open(bmethod,burl,true);
    if(Formdata){
    http_request.setRequestHeader("Content-Length",Formdata.length);   
    http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
    http_request.send(Formdata);
    }else{
        if(bXML){
            http_request.setRequestHeader("Content-Type","text/xml");
            //charset "text/xml;charset=utf-8";
        }else{
            http_request.setRequestHeader("Content-Type","text/html");
        }
    http_request.send(null);
    }
    
}

function handleStateChange()
{
    if(http_request.readyState==4 && http_request.status==200){
        var doc;
        if(bXML){
        content=http_request.responseXML;
        }else{
        content=http_request.responseText;
        }
        eval(rdRandleResponse+"(content)");
    }
}
doHttpRequest();
}

//tools
function getTagValue(doc, tag){
     var elems = doc.getElementsByTagName(tag)[0].firstChild.nodeValue;
     return elems; 
}

function $(obj){
  return document.getElementById(obj);    
}

function $F(obj){
  return document.getElementById(obj).value;
}
function $U(str){
  return encodeURIComponent(escape(str));    
}