function textName(){
        var a = document.getElementById("ui").value;
            
        if(a==""){
            document.getElementById("qwe").innerHTML="帐号不能为空";
            return false;
        }
        if(a.length<8){
            document.getElementById("qwe").innerHTML="帐号长度不能小于8位";
            return false;
        }
        document.getElementById("qwe").innerHTML="";
        return true;
}