/*------------------------------------------
Name: AJAXRequest
Author: yesoul
Website: http://www.772.cn
------------------------------------------*/
function AJAXRequest() {
	var xmlPool = new Array;
	var xmlVersion = ["MSXML2.XMLHTTP","Microsoft.XMLHTTP"];
	var AJAX = this;
	if(arguments[0]) this.url=arguments[0]; else this.url="";
	if(arguments[1]) this.oncomplete=arguments[1]; else this.oncomplete=function(obj){return};
	if(arguments[2]) this.content=arguments[2]; else this.content="";
	if(arguments[3]) this.method=arguments[3]; else this.method="POST";
	if(arguments[4]) this.async=arguments[4]; else this.async=true;
	if(!getObj()) return false;
	function getObj() {
		var i;
		for(i=0;i<xmlPool.length;i++) if(xmlPool[i].readystate==4) return xmlPool[i];
		var tmpObj;
		try { tmpObj=new XMLHttpRequest; }
		catch(e) {
			for(i=0;i<xmlVersion.length;i++) {
				try { tmpObj=new ActiveXObject(xmlVersion[i]); }
				catch(e2) { continue; }
				break;
			}
		}
		if(!tmpObj) return false;
		else {
			xmlPool[xmlPool.length]=tmpObj;
			return xmlPool[xmlPool.length-1];
		}
	}
	this.send=function() {
		var purl,pcbf,pc,pm,pa,xmlObj;
		xmlObj=getObj();
		if(!xmlObj) return false;
		if(arguments[0]) purl=arguments[0]; else purl=this.url;
		if(arguments[1]) pc=arguments[1]; else pc=this.content;
		if(arguments[2]) pcbf=arguments[2]; else pcbf=this.oncomplete;
		if(arguments[3]) pm=arguments[3]; else pm=this.method;
		if(arguments[4]) pa=arguments[4]; else pa=this.async;
		if(!pm||!purl||!pa) return false;
		xmlObj.open(pm,purl,pa);
		if(pm=="POST") xmlObj.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
		xmlObj.onreadystatechange=function() {
			if(xmlObj.readyState==4)
				if(xmlObj.status==200) pcbf(xmlObj); else pcbf(null);
		}
		if(pm=="POST") xmlObj.send(pc); else xmlObj.send("");
	}
	this.get=function() {
		var purl,pcbf;
		if(arguments[0]) purl=arguments[0]; else purl=this.url;
		if(arguments[1]) pcbf=arguments[1]; else pcbf=this.oncomplete;
		if(!purl&&!pcbf) return false;
		this.send(purl,"",pcbf,"GET",true);
	}
	this.update=function() {
		var purl,puo,pinv,pcnt,rinv,ucb;
		if(arguments[0]) purl=arguments[0]; else purl=this.url;
		if(arguments[1]) puo=arguments[1];
		if(arguments[2]&&!isNaN(parseInt(arguments[2]))) pinv=parseInt(arguments[2]);
		if(arguments[3]&&!isNaN(parseInt(arguments[3]))) pcnt=parseInt(arguments[3]);
		if(puo)
			ucb=function(obj) {
				if(puo.nodeName=="DIV") puo.innerHTML=obj.responseText;
				else if(puo.nodeName=="INPUT"||puo.nodeName=="TEXTAREA") puo.value=obj.responseText;
				else return;
			}
		else
			ucb=function(obj) { return; }
		if(pinv&&pinv>0)
			if(pcnt&&pcnt>0) {
				var cf=function(cc) {
					AJAX.send(purl,"",ucb,"GET",true);
					if(cc<1) return; else cc--;
					setTimeout(cf,pinv,cc);
				}
				cf(--pcnt);
			}
			else
				return(setInterval(this.send,pinv,purl,"",ucb,"GET",true));
		else
			this.send(purl,"",ucb,"GET",true);
	}
	this.post=function() {
		var purl,pcbf,pc;
		if(arguments[0]) purl=arguments[0]; else purl=this.url;
		if(arguments[1]) pcbf=arguments[1]; else pcbf=this.oncomplete;
		if(arguments[2]) pc=arguments[2]; else pc="";
		if(!purl&&!pcbf) return false;
		this.send(purl,pc,pcbf,"POST",true);
	}
	this.postf=function() {
		var fo,pcbf,purl,pc,pm;
		if(arguments[0]) fo=arguments[0]; else return false;
		if(arguments[1]) pcbf=arguments[1]; else pcbf=this.oncomplete;
		if(arguments[2]) purl=arguments[2];
		else if(fo.action) purl=fo.action;
		else purl=this.url;
		if(arguments[3]) pm=arguments[3];
		else if(fo.method) pm=fo.method.toLowerCase();
		else pm="post";
		if(!pcbf&&!purl) return false;
		pc=this.formToStr(fo);
		if(!pc) return false;
		if(pm) {
			if(pm=="post") this.send(purl,pc,pcbf,"POST",true);
			else
				if(purl.indexOf("?")>0) this.send(purl+"&"+pc,"",pcbf,"GET",true);
				else this.send(purl+"?"+pc,"",pcbf,"GET",true);
		}
		else this.send(purl,pc,pcbf,"POST",true);
	}
	// formToStr
	// from SurfChen <surfchen@gmail.com>
	// @url     http://www.surfchen.org/
	// @license http://www.gnu.org/licenses/gpl.html GPL
	// modified by yesoul
	// @url     http://www.772.cn/
	this.formToStr=function(fc) {
		var i,query_string="",and="",property_value="";
		for(i=0;i<fc.length;i++) {
			e=fc[i];
			if (e.name!='' && e.disabled==false) {
				if (e.type=='select-one') element_value=e.options[e.selectedIndex].value;
				else if (e.type=='checkbox' || e.type=='radio') {
					if (e.checked==false) continue;
					element_value=e.value;
				}
				else element_value=e.value;
				element_value=encodeURIComponent(element_value);
				property_value=this.getElementProperty(e);
				property_value=(property_value!=""?property_value+"{#_#}":"");
				query_string+=and+e.name+'='+property_value+element_value;
				and="&";
			}
		}
		//alert(query_string);
		return query_string;
	}
	this.getElementProperty=function(o) {
		var i,property_string="",and="";
		var customAttributes = "DataType,Message,Require,To,Min,Max,ToElement,ParseType,MinElement,MaxElement,Format,Elements,Accept".split(",");
		//var customAttributes = "DataType,Message,Require,To,Min,Max,ToElement,ParseType,MinElement,MaxElement,Format,Elements,Accept,DependOn,Script,Pattern,Operator,AlertType,Trim,Tips,name,id".split(",");
		var len1 = customAttributes.length;
		if(!o.getAttribute("DataType"))return property_string;
		for(var j=0;j<len1;j++){
			var name = customAttributes[j];
			if(!o.getAttribute(name) || name=="Script")continue;
			else property_string+=and+name+'='+encodeURIComponent(o.getAttribute(name));//对提交的字符编码，不能用escape编码，会把+号去掉
			and="{#_#}";
		}
		return property_string;
	}
}