how ensure there no special characters in name except apostrophe...eg:- can allow o'connor not john "doe" ? please help.
here's working example of how you'd use regular expression check valid name given conditions laid out:
<!doctype html> <html> <head> <title>check name</title> <script> var goodname = /^[a-za-z'\s]+$/; function checkname(name){ if (goodname.test(name)) { alert("name great!"); } else { alert("name contains illegal characters"); } } </script> </head> <body> <form onsubmit="return false;"> <input type="text" name="name" size="20"> <input type="button" value="check" onclick="checkname(this.form.name.value);"> </form> </body> </html> the /^[a-za-z'\s]+$/ regular expression allows uppercase english, lowercase english, apostrophes, , spaces. (it's similar 1 proposed afiefh, addition of \s allow spaces, , + instead of * prevent blank names passing test.)
as david dorward suggests above, if using test names, might consider relaxing rule accommodate international names changing line 6 this:
var goodname = /^([ \u00c0-\u01ffa-za-z'\-])+$/; this allows unicode characters, apostrophes, , hyphens.
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