在 JavaScript 中成功验证后，我无法显示任何消息，如果语句最终我会出错。我想显示我们会在通过验证后回复您。
<script>
function validateForm() {
var x = document.forms["myForm"]["fname"].value;
if (x.length < 10) {
window.alert("The field cannot contain more than 10 characters!");
return false;
}
}
function validateForm() {
var k = document.forms["myForm"]["query"].value;
if (k.length < 25) {
window.alert("The field cannot contain atleast 25 characters!");
return false;
}
}
function validateForm() {
var k1 = document.forms["myForm"]["email"].value;
var atpos = k1.indexOf("@");
var dotpos = k1.lastIndexOf(".");
if (atpos < 1 || dotpos < atpos + 2 || dotpos + 2 >= k1.length) {
alert("Not a valid e-mail address");
return false;
}
if (k1.length < 10) {
window.alert("The field cannot contain atleast 25 characters!");
}
}
if (x && k && k1 !== true) {
this.x = x;
this.k = k;
this.k1 = k1;
window.alert("We will get back to you");
}
</script>
function validateForm() {
var isValid = true;
var x = document.forms["myForm"]["fname"].value;
if (x.length < 10){
window.alert("The field cannot contain more than 10 characters!");
isValid = false;
}
var k = document.forms["myForm"]["query"].value;
if (k.length<25) {
window.alert("The field cannot contain atleast 25 characters!");
isValid = false;
}
var k1= document.forms["myForm"]["email"].value;
var atpos = k1.indexOf("@");
var dotpos = k1.lastIndexOf(".");
if (atpos < 1 || dotpos < atpos + 2 || dotpos + 2 >= k1.length) {
alert("Not a valid e-mail address");
isValid = false;
}
if (k1.length < 10) {
window.alert("The field cannot contain atleast 25 characters!");
isValid = false;
}
if (!isValid) {
// you should take a look here.. what do you want to achieve?
this.x = x;
this.k = k;
this.k1 = k1;
window.alert("We will get back to you");
}
return isValid;
}
表单应使用 onsubmit 属性：
<form onsubmit="return validateForm()"></form>
看看 http://jqueryvalidation.org/documentation/.你可以考虑开始学习jQuery或其他js框架。