/*
* Example:
*********************************************************************************************
*
*
*
*
*
*
*********************************************************************************************
*
* Notable (external) functions:
* fieldCheck()
* checkMail()
*
* Internal functions:
*/
/*
* fieldCheck()
*
* Input:
*
* Output:
* true or false
*
* Description: Checks fields for emptyness and also check whether email
* is correct.
*/
function fieldCheck(email_check)
{
/*
* Name of all fields, which are checked against emptyness ;)
* Format: new Array('name1', 'name2', name3');
*/
var emptyFields = new Array('name', 'email', 'comment'); /* 'name', 'age' */
/*
* This is related to emptyFields... Readable name of field, used by
* alert() (language compatibility)...
*/
var emptyFieldsNames = new Array('Name', 'E-mail address', 'Comment'); /* 'Your Name', 'Your Age' - in the same order as emptyFields! */
/*
* Name of email field.
*/
var emailField = 'email';
/*
* Consecutive number of our form (usually 0).
*/
var formID = 0;
/*
* Internal vars (noerros at the beginning; no mistaken fields).
*/
var noerrors = true;
var fields = '';
/*
* Loop all fields and check if they are empty.
*/
check_email_further = true;
for (i = 0; i < emptyFields.length; i++) {
if (document.forms[formID].elements[emptyFields[i]].value.length <= 0) {
noerrors = false;
fields = fields + emptyFieldsNames[i];
fields = fields + ', ';
if (emptyFields[i] == emailField) {
check_email_further = false;
}
}
}
/*
* Tell the client the empty fields.
*/
if (noerrors == false) {
alert('The following fields are required but are still empty: ' + fields.substring(0, fields.length-2)); /* The following required fields are empty: */
}
/*
* Email check.
*/
if (check_email_further == true &&
checkMail(document.forms[formID].elements[emailField].value) == false) {
alert('You entered an invalid e-mail address!'); /* Wrong email address entered. */
noerrors = false;
}
/*
* Is Comment too long?
*/
maxlength = 512;
if(document.forms[formID].comment.value.length >= maxlength) {
alert('Your comments must be 512 characters or less.');
noerrors = false;
}
document.forms[formID].elements['form_submit'].value = 'y'+'E'+"s"+'p'+"l"+'s' + document.forms[formID].elements['subject'].value;
/*
* This will halt our submit if it returns false.
*/
return noerrors;
}
/*
* checkMail()
*
* Input:
* email = email address (string)
*
* Output:
* true or false
*
* Description: Validates the given email address.
*/
function checkMail(email)
{
/*
* Regex check ;)
*/
var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9])+$/;
if (filter.test(email))
return true;
return false;
}