var minheight = 250;
var maxheight = 400;
function shoppingcat() {
    var key = document.getElementById("extendControl").innerText;
    var extendObject = document.getElementById("extendObject");
    if (key == "点我展开") {
        $("#extendObject").attr("class", "extendObject1");
        document.getElementById("extendControl").innerText = "点我关闭";
    } else {
    $("#extendObject").attr("class", "extendObject");
       document.getElementById("extendControl").innerText = "点我展开";
    }
}

function setTab(name, cursel, n) {
    for (i = 1; i <= n; i++) {
        var menu = document.getElementById(name + i);
        var con = document.getElementById("con_" + name + "_" + i);
        menu.className = i == cursel ? "selected" : "";
        con.style.display = i == cursel ? "block" : "none";
    }
}