#3
DOM? Hvad er det?
Jeg vil gerne lige se hvad du kan gøre. Det skal siges at det jo er et script jeg har fundet, men forstår godt helheden:
<html>
<head>
<title>WebCheatSheet - JavaScript Tutorial</title>
<script type="text/javascript">
function validatePhone(fld) {
var error = "";
var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');
if (fld.value == "") {
error = "You didn't enter a phone number.\n";
fld.style.background = 'Yellow';
} else if (isNaN(parseInt(stripped))) {
error = "The phone number contains illegal characters.\n";
fld.style.background = 'Yellow';
} else if (!(stripped.length == 10)) {
error = "The phone number is the wrong length. Make sure you included an area code.\n";
fld.style.background = 'Yellow';
}
return error;
}
function trim(s)
{
return s.replace(/^\s+|\s+$/, '');
}
function validateEmail(fld) {
var error="";
var tfld = trim(fld.value); // value of field with whitespace trimmed off
var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
if (fld.value == "") {
fld.style.background = 'Yellow';
error = "You didn't enter an email address.\n";
} else if (!emailFilter.test(tfld)) { //test email for illegal characters
fld.style.background = 'Yellow';
error = "Please enter a valid email address.\n";
} else if (fld.value.match(illegalChars)) {
fld.style.background = 'Yellow';
error = "The email address contains illegal characters.\n";
} else {
fld.style.background = 'White';
}
return error;
}
function validatePassword(fld) {
var error = "";
var illegalChars = /[\W_]/; // allow only letters and numbers
if (fld.value == "") {
fld.style.background = 'Yellow';
error = "You didn't enter a password.\n";
} else if ((fld.value.length < 7) || (fld.value.length > 15)) {
error = "The password is the wrong length. \n";
fld.style.background = 'Yellow';
} else if (illegalChars.test(fld.value)) {
error = "The password contains illegal characters.\n";
fld.style.background = 'Yellow';
} else if (!((fld.value.search(/(a-z)+/)) && (fld.value.search(/(0-9)+/)))) {
error = "The password must contain at least one numeral.\n";
fld.style.background = 'Yellow';
} else {
fld.style.background = 'White';
}
return error;
}
function validateUsername(fld) {
var error = "";
var illegalChars = /\W/; // allow letters, numbers, and underscores
if (fld.value == "") {
fld.style.background = 'Yellow';
error = "You didn't enter a username.\n";
} else if ((fld.value.length < 5) || (fld.value.length > 15)) {
fld.style.background = 'Yellow';
error = "The username is the wrong length.\n";
} else if (illegalChars.test(fld.value)) {
fld.style.background = 'Yellow';
error = "The username contains illegal characters.\n";
} else {
fld.style.background = 'White';
}
return error;
}
function validateEmpty(fld) {
var error = "";
if (fld.value.length == 0) {
fld.style.background = 'Yellow';
error = "The required field has not been filled in.\n"
} else {
fld.style.background = 'White';
}
return error;
}
function validateFormOnSubmit(theForm) {
var reason = "";
reason += validateUsername(theForm.username);
reason += validatePassword(theForm.pwd);
reason += validateEmail(theForm.email);
reason += validatePhone(theForm.phone);
reason += validateEmpty(theForm.from);
if (reason != "") {
alert("Some fields need correction:\n" + reason);
return false;
}
return true;
}
</script>
</head>
<body>
<form name="demo" onSubmit="return validateFormOnSubmit(this)" action="test.htm">
<table summary="Demonstration form">
<tbody>
<tr>
<td><label for="username">Your user name:</label></td>
<td><input name="username" size="35" maxlength="50" type="text"></td>
</tr>
<tr>
<td><label for="pwd">Your password</label></td>
<td><input name="pwd" size="35" maxlength="25" type="password"></td>
</tr>
<tr>
<td><label for="email">Your email:</label></td>
<td><input name="email" size="35" maxlength="30" type="text"></td>
</tr>
<tr>
<td><label for="phone">Your telephone number:</label></td>
<td><input name="phone" size="35" maxlength="25" type="text"></td>
</tr>
<tr>
<td>
<label for="from">Where are you :</label></td>
<td><input name="from" size="35" maxlength="50" type="text"></td>
</tr>
<tr>
<td> </td>
<td><input name="Submit" value="Send" type="submit" ></td>
<td> </td>
</tr>
</tbody>
</table>
</form>
</body>
</html>
