[英]Javascript validate two textbox
下面的代码验证两个名称服务器文本框。 如您所见,JavaScript代码中存在冗余。 // validate textbox 1
和// validate textbox 2
。 无论如何,我只能使用一个脚本。.您知道我只想使用1个验证功能来验证两个文本框。 我的英语不好意思,希望大家都能理解我。 谢谢。
<script type="text/javascript">
// validate textbox 1
function validate_domain(){
var nameserver1 = document.getElementById('nameserver1').value;
var domain_array = nameserver1.split('.');
var domain = domain_array[0];
//This is reguler expresion for domain validation
var reg = /^([A-Za-z0-9])+[A-Za-z0-9-]+([A-Za-z0-9])$/;
if(domain == ''){
alert("Please enter the domain name");
document.getElementsById('nameserver1').focus();
return false;
}
if(reg.test(domain) == false){
alert("Invalid character in domain. Only letters, numbers or hyphens are allowed.");
document.getElementsById('nameserver1').focus();
return false;
}
}
// validate textbox 2
function validate_domain(){
var nameserver1 = document.getElementById('nameserver1').value;
var domain_array = nameserver2.split('.');
var domain = domain_array[0];
//This is reguler expresion for domain validation
var reg = /^([A-Za-z0-9])+[A-Za-z0-9-]+([A-Za-z0-9])$/;
if(domain == ''){
alert("Please enter the domain name");
document.getElementsById('nameserver2').focus();
return false;
}
if(reg.test(domain) == false){
alert("Invalid character in domain. Only letters, numbers or hyphens are allowed.");
document.getElementsById('nameserver2').focus();
return false;
}
}
</script>
<fieldset class="inlineLabels">
<label for="name">Nameserver 1</label>
<input type="text" class="textInput" maxlength="255" size="30" value="" id="nameserver1" name="nameserver1">
<label for="data">Nameserver 2</label>
<input type="text" class="textInput" maxlength="255" size="30" value="" id="data" name="nameserver2">
</fieldset>
<button onclick="validate_domain(); submitForm('page1','directpage.php');" value="Validate" name="btn_validate" type="button" class="positive iconstxt icoPositive"><span>Save</span></button>
可能是这样的:
<script type="text/javascript">
function validate_domain(){
validateTextBox('nameserver1');
validateTextBox('nameserver2');
}
function validateTextBox(tbName){
var nameserver1 = document.getElementById(tbName).value;
var domain_array = nameserver1.split('.');
var domain = domain_array[0];
//This is reguler expresion for domain validation
var reg = /^([A-Za-z0-9])+[A-Za-z0-9-]+([A-Za-z0-9])$/;
if(domain == ''){
alert("Please enter the domain name");
document.getElementsById(tbName).focus();
return false;
}
if(reg.test(domain) == false){
alert("Invalid character in domain. Only letters, numbers or hyphens are allowed.");
document.getElementsById(tbName).focus();
return false;
}
}
}
</script>
好吧,这是另一种方法:
function ValidateDomain(){
function CheckForBlank(domain, textBox){
if(domain == ''){
alert("Please enter the domain name");
document.getElementsById('nameserver1').focus();
return false;
}
}
function CheckForFormat(domain, textBox){
if(reg.test(domain) == false){
alert("Invalid character in domain. Only letters, numbers or hyphens are allowed.");
document.getElementsById('nameserver1').focus();
return false;
}
}
function GetDomainName(inputId){
var serverName = document.getElementById(inputId).value,
domain_array = serverName.split('.');
return domain_array[0];
}
var nameserver1 = GetDomainName('nameserver1'),
nameserver2 = GetDomainName('nameserver2'),
nameServerInput1 = document.getElementsById('nameserver1');
nameServerInput2 = document.getElementsById('nameserver2');
if (CheckForFormat(nameserver1,nameServerInput1) && CheckForBlank(nameserver1,nameServerInput1)
&& CheckForFormat(nameserver2,nameServerInput2) && CheckForBlank(nameserver2,nameServerInput2)){
//This means you are valid
return {
name1:nameserver1,
name2:nameserver2
}
}
return false;
}
在工作中看到了这个。 在家玩。 这是一个工作的jsFiddle 。 是的,它过于复杂,但是我讨厌alert('annoying pop-up');
。
我评论了来源,所以您会更好地理解为什么我这样写。
sg522 :它可能不会复制/粘贴到您的代码中并可以正常工作,但是我不知道其余的代码是什么。 我们都不是在这里为您编写代码。 我们在这里帮助您学习并成为更有经验的程序员。
如果您有任何疑问,请告诉我们。
编码愉快!
更新:修改了jsFiddle以与Opera和Firefox 10一起使用cloneNode
或Firefox显然都不允许现在不带参数地调用cloneNode
。 Opera显然也不允许链接变量声明。
将要验证的元素的id作为函数的参数。
// validate textbox
function validate_domain(serverName){
var server = document.getElementById(serverName).value;
var domain_array = server.split('.');
var domain = domain_array[0];
//This is reguler expresion for domain validation
var reg = /^([A-Za-z0-9])+[A-Za-z0-9-]+([A-Za-z0-9])$/;
if(domain == ''){
alert("Please enter the domain name");
document.getElementsById(serverName).focus();
return false;
}
if(reg.test(domain) == false){
alert("Invalid character in domain. Only letters, numbers or hyphens are allowed.");
document.getElementsById(serverName).focus();
return false;
}
}
<script type="text/javascript">
// validate textbox
function validate_domain(ele){
var nameserver = ele.value;
var domain_array = nameserver.split('.');
var domain = domain_array[0];
//This is reguler expresion for domain validation
var reg = /^([A-Za-z0-9])+[A-Za-z0-9-]+([A-Za-z0-9])$/;
if(domain == ''){
alert("Please enter the domain name");
ele.focus();
return false;
}
if(reg.test(domain) == false){
alert("Invalid character in domain. Only letters, numbers or hyphens are allowed.");
ele.focus();
return false;
}
}
</script>
<fieldset class="inlineLabels">
<label for="name">Nameserver 1</label>
<input type="text" class="textInput" maxlength="255" size="30" value="" id="nameserver1" name="nameserver1">
<label for="data">Nameserver 2</label>
<input type="text" class="textInput" maxlength="255" size="30" value="" id="data" name="nameserver2">
</fieldset>
<button onclick="validate_domain(document.getElementById('nameserver1')); validate_domain(document.getElementById('nameserver2')); submitForm('page1','directpage.php');" value="Validate" name="btn_validate" type="button" class="positive iconstxt icoPositive"><span>Save</span></button>
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