Javascript
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To remove stuff such as punction and spaces (or anything you want) from a text box before sending to the server for validation you can use code like this, first the HTML:-
<input
name="name"
onblur="this.value = entrycheck(this.value);"
type="text"
size="20">
And then the following Javascript will remove invalid characters when the user moves to another field:-
<script type="text/javascript">
function namecheck(theInput) {
var valid [...]
Continue reading about Limiting text input to characters and digits
