function imgAuto(img, maxW, maxH) {
	var oriImg = document.createElement("img");
	oriImg.onload = function(){
		if (oriImg.width == 0 || oriImg.height == 0)
			return;
		var oriW$H = oriImg.width / oriImg.height;
		// var maxW$H = maxW / maxH;

		if (oriImg.height > maxH) {
			img.height = maxH;
			// img.removeAttribute("width");
			img.width = maxH * oriW$H;
		}
		if (img.width > maxW) {
			img.width = maxW;
			// img.removeAttribute("height");
			img.height = maxW / oriW$H;
		}

		if (maxH) {// if it defined the maxH argument
			if (img.height > 0)
				img.style.marginTop = (maxH - img.height) / 2 + "px";
		}
		if (maxW) {// if it defined the maxW argument
			if (img.width > 0)
				img.style.marginLeft = (maxW - img.width) / 2 + "px";
		}
	};
	oriImg.src = img.src;
}

function errorImage(obj, url) {
	if (url == null || url == "") {
		obj.src = "/images/noimage.jpg";
	} else {
		obj.onerror = function() {
			obj.src = "/images/noimage.jpg";
		};
		obj.src = url;
		
	}
}

/**
 * parse url search to map
 * 
 * @param src
 *            url search
 * @return params map
 */
function parseParams(src) {
	var paramMap = {};
	if(src==null||src=="")
		return paramMap;
	var params = src.split("&");
	for ( var i = 0; i < params.length; ++i) {
		var tmp = params[i].split("=");
		if (!paramMap[tmp[0]]) {
			paramMap[tmp[0]] = [];
		}
		if(tmp.length == 2)
			paramMap[tmp[0]].push(tmp[1]);
	}
	return paramMap;
}

function paramsMapToURL(paramMap) {
	var v = [];
	for(var name in paramMap) {
		if(paramMap[name].length > 0) {
			for(var i = 0; i < paramMap[name].length; ++i)  {
				v.push(name + "=" + paramMap[name][i]);
			}
		} else {
			v.push(name);
		}
	}
	return v.join("&");
}

function limitStringInByte(str, len) {
	if(!str || len < 1) {
		return "";
	}
	var v = "";
	for(var i = 0; i < str.length; ++i) {
		v += str.charAt(i);
		--len;
		if( str.charCodeAt(i) > 128 ) {
			--len;
		}
		if(len <= 0) {
			break;
		}
	}
	return v;
}

//jQuery(document).ready(function(){

//	var tmpImgSrc = window.WWWURL + "/images/icon_009.gif";
//	jQuery("img[orisrc]").each(function(){
//		var img = this;
//		var errsrc = img.getAttribute("errsrc");
//		img.src = errsrc || tmpImgSrc;
//		var oriSrc = img.getAttribute("orisrc");
//		var serverSrc = oriSrc;
//		var tryImg = document.createElement("img");
//		tryImg.onload = function(){
//			adjustImg(img, tryImg);
//			img.src = serverSrc;
//		};
//		tryImg.onerror = function(){
//			var oriImg = document.createElement("img");
//			oriImg.onload = function(){
//				adjustImg(img, oriImg);
//				img.src = oriSrc;
//			};
//			oriImg.src = oriSrc;
//		};
//		tryImg.src = serverSrc;
//	});

//});

/**
 * adjust image size
 * @param dst
 * @param ori
 */
function adjustImg(dst, ori) {
	if (ori.width == 0 || ori.height == 0)
		return;
	var oriW$H = ori.width / ori.height;
	var maxH = dst.height, maxW = dst.width;
	dst.removeAttribute("width");
	dst.removeAttribute("height");
	var changed = false;

	if (ori.height > maxH) {
		changed = true;
		dst.height = maxH;
		dst.width = maxH * oriW$H;
		if (dst.width > maxW) {
			dst.width = maxW;
			dst.height = maxW / oriW$H;
		}
	} else if (ori.width > maxW) {
		changed = true;
		dst.width = maxW;
		dst.height = maxW / oriW$H;
		if (dst.height > maxH) {
			dst.height = maxH;
			dst.width = maxH * oriW$H;
		}
	}

	if (dst.height > 0) {
		dst.style.marginTop = (maxH - (changed ? dst : ori).height) / 2 + "px";
		//dst.style.marginLeft = (maxW - (changed ? dst : ori).width) / 2 + "px";
	}
}

//js get uri address
function _getURI(){
	var href=location.href;
	var domain=window.document.domain;
	var s=href.replace("http://"+domain+"/","");
	if(s.indexOf("?")>=0){
		s=s.substring(0,s.indexOf("?"));
	}
	if(s.indexOf("&")>=0){
		s=s.substring(0,s.indexOf("&"));
	}
	return s;
}
//get encoding from browser
function getBrowerEncoding(){
	if(navigator.userAgent.indexOf('Opera') >= 0||navigator.userAgent.indexOf('Firefox') >= 0){
		return "gbk";
	}else{
		return "utf-8";
	}
}
//request.getParameter(qs)
function _getUrlValue(qs){
    var s = location.href;
    s = s.replace("?","?&").split("&");
    var re = "";
    for(var i=0;i<s.length;i++){
       if(s[i].indexOf(qs+"=")==0){
         re = s[i].replace(qs+"=","");
         break;
        }
    }
    return re;
}