/* press enter plugin 
 * using: $("#loginName").onEnter(function(){})
 * */
(function($) {
    $.fn.onEnter = function(func) {
        this.bind('keypress', function(e) {
            if (e.keyCode == 13) func.apply(this, [e]);    
        });               
        return this; 
     };
})(jQuery);

function QueryString(fieldName) {
	var urlString = document.location.search;
	if (urlString != null) {
		var typeQu = fieldName + "=";
		var urlEnd = urlString.indexOf(typeQu);
		if (urlEnd != -1) {
			var paramsUrl = urlString.substring(urlEnd + typeQu.length);
			var isEnd = paramsUrl.indexOf('&');
			if (isEnd != -1) {
				return paramsUrl.substring(0, isEnd);
			} else {
				return paramsUrl;
			}
		} else {
			return null;
		}
	} else {
		return null;
	}
}

/* cookie */
function getCookie(theName)
{
   if (document.cookie.length>0)
  {
     var c_list = document.cookie.split("\;");
	 for ( i in c_list )
	 {
	     var cook = c_list[i].split("=");
		 if ( cook[0] == theName )
		 {
		     return unescape(cook[1]);
		}
	} 
  }
  return null;
}

function setCookie(theName,value,expiredays)
{
  var exdate=new Date();
  exdate.setDate(exdate.getDate()+expiredays);
  document.cookie=theName+ "=" +escape(value)+ ((expiredays==null) ? "" : ";expires="+exdate.toGMTString);
}

function timestamp()
{ 
	//var str = "?sessid=" + getCookie("sessid") +"&time="+new Date().getTime();
	//return "?%0C"+new Date().getTime();
	return "?sessid=" + getCookie("sessid") +"&time="+new Date().getTime();
}

/**
 * 获取图片尺寸
 * cfg <object> {img:new Image,oncomplete:new * Function, maxWidth:Number}
 */
var getImageSize = function(cfg) 
{
	/* 如果图片在缓存中或者图片已经指定了宽和高并且小于最大宽度 */
	if (cfg.img.complete || cfg.img.width && cfg.img.height
			&& cfg.img.width < cfg.maxWidth) {
		cfg.oncomplete.call({
			"img" : cfg.img,
			"width" : cfg.img.width,
			"height" : cfg.img.height
		}, null);
		return;
	}
	var img = document.createElement('img'), callback = cfg.oncomplete;
	img.src = cfg.img.src;
	img.style.position='absolute';
	img.style.visibility='hidden';
	img.style.left='-9999px';
	img.style.top='-9999px';
	
	document.body.appendChild(img);
	img.onload = img.onerror = img.onreadystatechange = function() {
		if (img && img.readyState && img.readyState != 'loaded'
				&& img.readyState != 'complete') {
			return false;
		}
		img.onload = img.onreadystatechange = img.onerror = null;
		callback.call({
			"img" : cfg.img,
			"width" : img.width,
			"height" : img.height
		}, null);
		document.body.removeChild(img);
		img = null;
	};
};

function escapeRegExp(string) {
    return string.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
}

function replaceAll(string, find, replace) {
  return string.replace(new RegExp(escapeRegExp(find), 'g'), replace);
}

function addLeadingZero(s) {
    return (s<10)?('0'+s):s;    
};