function validateComment() {
    var commentForm = document.commentForm;
    var content = commentForm.commentcontent.value
    if (!content || content.length > 500) {
        alert("请填写少于500字的评论");
        return false;
    } else {
        return true;
    }
}

function commentLength() {
    var commentForm = document.commentForm;
    var content = commentForm.content.value
    if (content) {
        document.getElementById("commentLength").innerText = "共输入了" + content.length + "字"
    }
}

function validateNews() {
    var newsForm = document.newsForm;
    var content = newsForm.content.value
    if (!content || content.length > 5000) {
        alert("请发布5000字以内的信息");
        return false;
    } else {
        return true;
    }
}

function newsLength() {
    var commentForm = document.newsForm;
    var content = commentForm.content.value
    if (content) {
        document.getElementById("newsLength").innerText = "共输入了" + content.length + "字"
    }
}

function sure(action) {
    return confirm("您确定要进行这项" + action + "操作吗？")
}


function validateLoginForm() {
    var loginForm = document.userLoginForm;
    if (loginForm.loginName.value && loginForm.password.value) {
        return true;
    } else {
        alert("请输入用户名和密码！");
        return false;
    }
}

function validateRegForm() {
    var regForm = document.userRegForm;

    if (!regForm.loginName.value) {
        alert("请输入用户名！");
        return false;
    } else if (!regForm.password.value) {
        alert("请输入密码！");
        return false;
    } else if (!regForm.repassword.value) {
        alert("请输入确认密码！");
        return false;
    } else if (!regForm.securityAnswer.value) {
        alert("请输入提示问题答案！");
        return false;
    } else if (!regForm.name.value) {
        alert("请输入真实姓名！");
        return false;
    }else if(regForm.password.value != regForm.repassword.value){
        alert("两次输入密码不一致，请重新输入！");
        return false;
    } else {
        return true;
    }
}

function validateOrderForm(){
    var   numPat=/^[1-9][0-9]*$/;

    var orderForm = document.orderForm;
    if(!orderForm.name.value){
         alert("请输入姓名！");
        return false;
    }else if(!orderForm.phone.value){
         alert("请输入电话号码！");
        return false;
    } else if(!orderForm.start.value){
         alert("起始期数！");
        return false;
    } else if(!orderForm.cnt.value){

         alert("请输入订阅份数！");
         return false;


    }else if(!orderForm.address.value){
         alert("请输入地址！");
        return false;
    } else if(!orderForm.zip.value){
         alert("请输入邮政编码！");
        return false;
    }else if(!numPat(orderForm.cnt.value)){
         alert("订阅份数必需是数字！");
         return false;
    }
    return true;
}



function validateRepassword(){
     var rePasswordForm = document.rePasswordForm;

    if(!rePasswordForm.oldPassword.value){
        alert("请输入原密码！");
         return false;
    }else if(!rePasswordForm.password.value){
        alert("请输入新密码！");
         return false;

    }else if(!rePasswordForm.repassword.value){
        alert("订请输入确认密码！");
         return false;

    }else if(rePasswordForm.password.value != rePasswordForm.repassword.value){
        alert("两次输入密码不一致！");
         return false;

    }
    return true;
}