动态加载JS

<script>

    Date.prototype.format = function(format) {

        var o = {

            "M+" : this.getMonth() + 1, //month

            "d+" : this.getDate(), //day

            "h+" : this.getHours(), //hour

            "m+" : this.getMinutes(), //minute

            "s+" : this.getSeconds(), //second

            "q+" : Math.floor((this.getMonth() + 3) / 3), //quarter

            "S" : this.getMilliseconds()

        //millisecond

        }

        if (/(y+)/.test(format))

            format = format.replace(RegExp.$1, (this.getFullYear() + "")

                    .substr(4 - RegExp.$1.length));

        for ( var k in o)

            if (new RegExp("(" + k + ")").test(format))

                format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k]

                        : ("00" + o[k]).substr(("" + o[k]).length));

        return format;

    }

    var dt = new Date().format('yyyyMMddhhmmss');

    document

            .write("<script type=\"text/javascript\" src='${ctx}/jslib/js/AtmMap.js?"

                    + dt + "'><\/script>");

</script>