function DynAjax(){this.timeout=300000;this.requests=[];this.reqnextid=0;this.semafor=true;this.autorefreshes=[];this.refnextid=0;this.ParamContainer=function(){this.paramsarr=[];this.paramstring='';this.acceptedparams=new Array("respfile","resultloc","paramloc","refreshtime","conftext","loadmsg","loadmsgloc");this.Param=function(name,value){this.name=name;this.value=value}
this.processParamString=function(paramstring){this.paramsarr=[];var parsrawarr=paramstring.split(';');for(rawindex=0;rawindex<parsrawarr.length;++rawindex){parrawstring=parsrawarr[rawindex];var parrawarr=parrawstring.split(':');if(parrawarr.length==2){var name=this.trimText(parrawarr[0]);var value=this.trimText(parrawarr[1]);if(name!=''){var param=new this.Param(name,value);for(pnameindex=0;pnameindex<this.acceptedparams.length;++pnameindex){accparam=this.acceptedparams[pnameindex];if(param.name==accparam)
this.paramsarr.push(param)}}}}}
this.get=function(name){for(paramindex=0;paramindex<this.paramsarr.length;++paramindex){param=this.paramsarr[paramindex];if(param.name==name)
return param.value}
return null}
this.set=function(name,value){for(paramindex=0;paramindex<this.paramsarr.length;++paramindex){param=this.paramsarr[paramindex];if(param.name==name)
this.paramsarr[paramindex].value=value}}
this.trimText=function(text){while(text.substring(0,1)==' ')
text=text.substring(1,text.length);while(text.substring(text.length-1,text.length)==' ')
text=text.substring(0,text.length-1);return text}
this.getParamString=function(){var paramstring='';for(paramindex=0;paramindex<this.paramsarr.length;++paramindex){param=this.paramsarr[paramindex];if(param.value!=null)
paramstring+=param.name+": "+param.value+"; "}
return paramstring}}
this.request=function(paramstring,resultfunc){this.cleanUpRequests();var params=new this.ParamContainer();params.processParamString(paramstring);if(params.get('conftext')==null||confirm(params.get('conftext'))){this.semaforStart();var request=new this.DynAjaxRequest(this.reqnextid,params,resultfunc);this.requests.push(request);++this.reqnextid;this.semaforEnd();request.doRequest();if(params.get('refreshtime')!=null){this.semaforStart();var refresh=new this.AutoRefresh(this.refnextid,params,resultfunc);this.autorefreshes.push(refresh);++this.refnextid;this.semaforEnd();refresh.beginref()}}}
this.cleanUpRequests=function(){this.semaforStart();for(i=0;i<this.requests.length;++i){current=new Date().getTime();if(current-this.requests[i].timestamp>this.timeout)
this.requests.splice(i,1)}
this.semaforEnd()}
this.getRequest=function(id){this.semaforStart();request=this.requests[this.getPos(id)];this.semaforEnd();return request}
this.delRequest=function(id){this.semaforStart();this.requests.splice(this.getPos(id),1);this.semaforEnd()}
this.getPos=function(id){for(i=0;i<this.requests.length;++i)
if(this.requests[i].id==id)
return i;throw "Request not found"}
this.semaforStart=function(){while(this.semafor==false)
this.pause(1);this.semafor=false}
this.semaforEnd=function(){this.semafor=true}
this.pause=function(milli){var date=new Date();do {newdate=new Date()}
while(newdate-date<milli)}
this.DynAjaxRequest=function(id,params,resultfunc){this.id=id;this.params=params;this.resultfunc=resultfunc;this.timestamp=new Date().getTime();this.xmlhttp;this.doRequest=function(){var url=this.getUrl();var querystring=this.getQueryString();var actionfunction=this.getActionFunction();this.xmlhttp=this.getXmlHttp(url,querystring,actionfunction);if((this.params.get('loadmsg')!=null)){var loadmsgloc=this.params.get('loadmsgloc');var target=loadmsgloc==null?this.params.get('resultloc'):loadmsgloc;if(document.getElementById(target).innerHTML!=this.params.get('loadmsg'))
document.getElementById(target).innerHTML=this.params.get('loadmsg')}
this.xmlhttp.send(querystring)}
this.getActionFunction=function(){var actionstring="";actionstring+="request = dynajax.getRequest("+this.id+");\nif(request.xmlhttp.readyState == 4 && request.xmlhttp.status == 200)\n{\n";if(this.params.get('resultloc'))
actionstring+="if(document.getElementById(\""+this.params.get('resultloc')+"\").innerHTML != request.xmlhttp.responseText) document.getElementById(\""+this.params.get('resultloc')+"\").innerHTML = request.xmlhttp.responseText;\n";if(this.resultfunc!=undefined&&this.resultfunc!=null)
actionstring+="request.resultfunc(request.xmlhttp.responseText);\n";actionstring+="dynajax.delRequest("+this.id+");\n}";var actionfunction=new Function(actionstring);return actionfunction}
this.getUrl=function(){connectchar=this.params.get('respfile').indexOf('?')!=-1?'&':'?';var url=this.params.get('respfile')+connectchar+"timeStamp="+this.timestamp;return url}
this.getFields=function(){pdiv=document.getElementById(this.params.get('paramloc'));var fieldtypes=new Array("input","textarea","select");fields=[];for(typeid=0;typeid<fieldtypes.length;++typeid){fieldtype=fieldtypes[typeid];nodes=pdiv.getElementsByTagName(fieldtype);for(nodeid=0;nodeid<nodes.length;++nodeid){node=nodes[nodeid];if((fieldtype!="input"||(fieldtype=="input"&&node.type!="button"&&node.type!="file")&&((node.type!="checkbox"&&node.type!="radio")||(node.checked)))&&((fieldtype=="input"||fieldtype=="textarea"||fieldtype=="select")&&!node.disabled))
fields.push(node)}}
return fields}
this.getQueryString=function(){querystring='';if(this.params.get('paramloc')!=null){var fields=this.getFields();for(i=0;i<fields.length;++i){var node=fields[i];if(node.name!=""&&node.type!="file")
querystring+='&'+node.name+'='+escape(node.value)}}
return querystring}
this.getXmlHttp=function(url,querystring,actionfunction){var xmlhttp=window.XMLHttpRequest?new XMLHttpRequest():new ActiveXObject("MSXML2.XMLHTTP.3.0");method=(this.params.get('paramloc')==null)?"GET":"POST";xmlhttp.open(method,url,true);xmlhttp.onreadystatechange=actionfunction;xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");xmlhttp.setRequestHeader("Connection","close");xmlhttp.setRequestHeader("Content-length",querystring.length);return xmlhttp}}
this.AutoRefresh=function(id,params,resultfunc){this.timer=null;this.refreshtime;this.id=id;this.params=params;this.resultfunc=resultfunc;this.beginref=function(){this.refreshtime=this.params.get('refreshtime');this.params.set('refreshtime',null);setInterval("refresh = dynajax.autorefreshes["+this.id+"]; dynajax.request( refresh.params.getParamString(), refresh.resultfunc);",this.refreshtime)}}}
var dynajax=new DynAjax();