var Util={
	cutResource:function (aJID) { // removes resource from a given jid
	  if (typeof(aJID) == 'undefined' || !aJID)
	    return;
	  var retval = aJID;
	  if (retval.indexOf("/") != -1)
	    retval = retval.substring(0,retval.indexOf("/"));
	  return retval;
	},
	cutResourceAtFlag:function (aJID) { // removes resource from a given jid
	  if (typeof(aJID) == 'undefined' || !aJID)
	    return;
	  var retval = aJID;
	  if (retval.indexOf("@") != -1)
	    retval = retval.substring(0,retval.indexOf("@"));
	  return retval;
	},
	getResourceName:function (aJID) {
		if (typeof(aJID) == 'undefined' || !aJID) return;
		var retval = aJID;		
		if (retval.indexOf("/") != -1)    retval = retval.substring(retval.indexOf("/")+1);
		return retval;
	},
	getCurrentOnlyTime:function(){
		var df = new DateFormat("HH:mm:ss");
		return df.format(new Date());
		//var date=new Date();
		//return date.getHours()+":"+date.getMinutes()+":"+date.getSeconds()
	},
	getCurrentTime:function(){
		var df = new DateFormat("yyyy-MM-dd HH:mm:ss");
		return df.format(new Date());
		//var date=new Date();
		//return date.getFullYear()+"-"+(date.getMonth()+1)+"-"+date.getDate()+" "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds()
	},
	getCurrentTimeForMsg:function(){
		var df = new DateFormat("yyyy-MM-dd HH:mm");
		return df.format(new Date());
		//var date=new Date();
		//return date.getFullYear()+"-"+(date.getMonth()+1)+"-"+date.getDate()+" "+date.getHours()+":"+date.getMinutes()
	},
	null2String:function(str){
		if(str==null)
			return "";
		else 
			return str;
	}
	
}

function DateFormat(pattern, formatSymbols)
{
    if(pattern == null || pattern == undefined)
    {
        pattern = "yyyy-MM-dd HH:mm:ss SSS";
    }

    if(formatSymbols == null || formatSymbols == undefined)
    {
        formatSymbols = "yMdHmsS";
    }

    this.pattern = pattern;
    this.formatSymbols = formatSymbols;
}

DateFormat.prototype.format = function(date)
{
    var time = getTime(date);
    
    // 标记存入数组
    var cs = this.formatSymbols.split("");

    // 格式存入数组
    var fs = this.pattern.split("");

    // 构造数组
    var ds = time.split("");

    // 标志年月日的结束下标
    var y = 3;
    var M = 6;
    var d = 9;
    var H = 12;
    var m = 15;
    var s = 18;
    var S = 22;

    // 逐位替换年月日时分秒和毫秒
    for(var i = fs.length - 1; i > -1; i--)
    {
        switch (fs[i])
        {
            case cs[0]:
            {
                fs[i] = ds[y--];
                break;
            }
            case cs[1]:
            {
                fs[i] = ds[M--];
                break;
            }
            case cs[2]:
            {
                fs[i] = ds[d--];
                break;
            }
            case cs[3]:
            {
                fs[i] = ds[H--];
                break;
            }
            case cs[4]:
            {
                fs[i] = ds[m--];
                break;
            }
            case cs[5]:
            {
                fs[i] = ds[s--];
                break;
            }
            case cs[6]:
            {
                fs[i] = ds[S--];
                break;
            }
        }
    }

    return fs.join(""); 
}

DateFormat.prototype.parse = function(date)
{
    var y = "";
    var M = "";
    var d = "";
    var H = "";
    var m = "";
    var s = "";
    var S = "";

    // 标记存入数组
    var cs = this.formatSymbols.split("");

    // 格式存入数组
    var ds = this.pattern.split("");

    // date   = "2005-08-22 12:12:12 888";
    // format = "yyyy-MM-dd HH:mm:ss SSS";
    // sign   = "yMdHmsS";
    var size = Math.min(ds.length, date.length);

    for(var i=0; i<size; i++)
    {
        switch (ds[i])
        {
            case cs[0]:
            {
                y += date.charAt(i);
                break;
            }
            case cs[1]:
            {
                M += date.charAt(i);
                break;
            }
            case cs[2]:
            {
                d += date.charAt(i);
                break;
            }
            case cs[3]:
            {
                H += date.charAt(i);
                break;
            }
            case cs[4]:
            {
                m += date.charAt(i);
                break;
            }
            case cs[5]:
            {
                s += date.charAt(i);
                break;
            }
            case cs[6]:
            {
                S += date.charAt(i);
                break;
            }
        }
    }
    
    if(y.length < 1) y = 0; else y = parseInt(y);
    if(M.length < 1) M = 0; else M = parseInt(M);
    if(d.length < 1) d = 0; else d = parseInt(d);
    if(H.length < 1) H = 0; else H = parseInt(H);
    if(m.length < 1) m = 0; else m = parseInt(m);
    if(s.length < 1) s = 0; else s = parseInt(s);
    if(S.length < 1) S = 0; else S = parseInt(S);

    var d = new Date(y, M - 1, d, H, m, s, S);

    return d;
}

// 返回当前时间
function getTime(date)
{
    if(date == null)
    {
        date = new Date();
    }
    
    var y = date.getFullYear();
    var M = date.getMonth() + 1;
    var d = date.getDate();
    var h = date.getHours();
    var m = date.getMinutes();
    var s = date.getSeconds();
    var S = date.getTime()%1000;

    var html = y + "-";

    if(M < 10)
    {
        html += "0";
    }
    html += M + "-";

    if(d < 10)
    {
        html += "0";
    }
    html += d + " ";

    if(h < 10)
    {
        html += "0";
    }
    html += h + ":";

    if(m < 10)
    {
        html += "0";
    }
    html += m + ":";

    if(s < 10)
    {
        html += "0";
    }
    html += s;
    
    html += " ";

    if(S < 100)
    {
        html += "0"
    }

    if(S < 10)
    {
        html += "0";
    }

    html += S;

    return html;
}