//获取首页焦点图是第几侦
function Slideid() {
    var url = location.search;
    if (url.length > 1) {
        url = url.substring(1);
        var Url__ = url.split("&");
        var oid = "";
        for (var i = 0; i < Url__.length; i++) {
            var Url___ = Url__[i].split("=");
            if (Url___.length > 1) {
                if (Url___[0].toLowerCase() == "oid") {
                    oid = Url___[1] - 1;
                }
            }
        }
        if (oid < 0) {
            oid = -1;
            //alert("s1:"+oid);
        }
    } else {
        oid = -1;
        //alert("s3:"+oid);
    }
    return oid;
}