$(document).ready(function () {  
    $("#btnSubmit").click(function () {  
        return isEmpty("") && isNum();  
    });  
});  
  
//判断是否全部为空   
function isEmpty(expression) {  
    var arry;  
    if (typeof (expression) == "undefined") {  
        arry = $(".isEmpty");  
    } else {  
        arry = $(expression);  
    }  
    for (i = 0; i < arry.length; i++) {  
        var cur = $(arry[i]);  
        if (cur.val() == "") {  
            alert(cur.attr("info") + "不能为空！");  
            cur.focus();  
            return false;  
        }  
    }  
    return true;  
}  
  
//判断是否全是整数   
function isNum(expression) {  
    var arry;  
    if (typeof (expression) == "undefined") {  
        arry = $(".isNumber");  
    } else {  
        arry = $(expression);  
    }  
    for (i = 0; i < arry.length; i++) {  
        var cur = $(arry[i]);  
        if (!/^\d+$/.test(cur.val())) {  
            alert(cur.attr("info") + "必须是整数！");  
            cur.focus();  
            return false;  
        }  
    }  
    return true;  
}