Js时间加减函数

	/**
     * 时间加减
     * @param date - 时间格式支持yyyy-MM-dd HH:mm:ss | yyyy/MM/dd HH:mm:ss
     * @param type - 类型：h-小时加减 m-分钟加减 s-秒加减 mi-毫秒加减
     * @param number - 加减的数值，负数表示减
     * @return dateCalc - 加减后的时间，格式yyyy-MM-dd HH:mm:ss
     */
    $scope.dateCalc = function (date, type, number) {
        var timestamp1  = Date.parse(new Date(date));
        if (isNaN(timestamp1)){//兼容IE,safari...
            date = date.replace(/-/ig,"/");
            timestamp1 = Date.parse(new Date(date));
        }
        var timestamp2;
        switch(type){
			case "h":
                timestamp2 = timestamp1 + number*60000*60;
				break;
            case "m":
                timestamp2 = timestamp1 + number*60000;
				break;
			case "s":
                timestamp2 = timestamp1 + number*1000;
				break;
			case "mi":
                timestamp2 = timestamp1 + number;
				break;
        }
        var date = new Date(timestamp2);
        var Y = date.getFullYear() + '-';
        var M = (date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1) : date.getMonth()+1) + '-';
        var D = (date.getDate()<10?'0'+date.getDate():date.getDate()) + ' ';
        var h = (date.getHours()<10?'0'+date.getHours():date.getHours()) + ':';
        var m = (date.getMinutes()<10?'0'+date.getMinutes():date.getMinutes()) + ':';
        var s = date.getSeconds()<10?'0'+date.getSeconds():date.getSeconds();
        return Y+M+D+h+m+s;
    };