how to set focus back to a textfield after validation in a jsp page if it is wrong

<html>
<body>
<form method="POST" name="f1">

<input type="text" name="t1" onchange="validate(this.value)" >
<input type="text" name="t2" onchange="validate(this.value)">

</form>

<script language="javascript">

document.f1.t1.focus();
function validate(string) {

var valid="123456789"
for (var i=0; i< string.length; i++) {
if (valid.indexOf(string.charAt(i)) < 0) {
f1.t1.focus()
alert('not a number')

return false;
}
}

return true;
}
function validate1(string) {

var valid="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQ RSTUVWXYZ"
for (var i=0; i< string.length; i++) {
if (valid.indexOf(string.charAt(i)) < 0) {
alert('invalid characters');
return false;
}
}

return true;
}
</script>

</body>
</html>

Jun 30 '06 #1

Subscribe Post Reply

9875

Banfa

9,065

Expert Mod 8TB

Just posting code without stating the problem your are experiencing or the question you wish to ask is unlikely to get (m)any responses. Tell us what the problem is.

Also if you use the [html] and [/html] your posted code will be all formated and colourful, like this

[html]
<body>
<form method="POST" name="f1">

<input type="text" name="t1" onchange="validate(this.value)" >
<input type="text" name="t2" onchange="validate(this.value)">

</form>

<script language="javascript">

document.f1.t1.focus();
function validate(string) {

var valid="123456789"
for (var i=0; i< string.length; i++) {
if (valid.indexOf(string.charAt(i)) < 0) {
f1.t1.focus()
alert('not a number')

return false;
}
}

return true;
}
function validate1(string) {

var valid="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQ RSTUVWXYZ"
for (var i=0; i< string.length; i++) {
if (valid.indexOf(string.charAt(i)) < 0) {
alert('invalid characters');
return false;
}
}

return true;
}
</script>

</body>
</html>[/html]

Jun 30 '06 #2

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