function pages(ins) {
    var form = document.getElementById("page")
    var pt = document.getElementById("p")
    pt.value = ins;
    form.submit();
}

function pageson() {
    var form = document.getElementById("page")
    var inp = document.getElementById("input")
    if (isEmpty(inp.value)) {
        alert("请输入要去的页数号！");
        return false;
    } else {
        if (!ckint(inp.value)) {
            alert("输入页数号为数字！");
            return false;
        }
    }
    var pt = document.getElementById("p")
    pt.value = inp.value;
    form.submit();
}