how to allow only rh factor to be entered in java script

Question

i have to allow user to enter only RH factor of blood like -ve,+ve how to do this in java script. also can i use the same thing in java also?

Please help.

Regards

Java and JavaScript are completely different languages, so no, you will probably not be able to do the same thing. Also: show us what you've tried and give some context. It's quite hard to fathom what is being asked here. — Elias Van Ootegem, Nov 05 '12 at 06:48

score 1 · Accepted Answer · edited May 23 '17 at 11:48

1

Use regular expression. Its available in java and javascript both.

Check RegEx for Javascript to allow only alphanumeric for better understanding of regex expression.

for +ve and -ve 
var regex = /^[-+]+[v]+[e]$/i;

this is working..i just checked..enjoy

edited May 23 '17 at 11:48

Community

answered Nov 05 '12 at 06:49

arrest warrant

1

He tagged the question wit the regex tag, I think he's well aware of the existence of regex – Elias Van Ootegem Nov 05 '12 at 06:50
1

i know that..i think he dnt know how to write the expression in regex tag. – arrest warrant Nov 05 '12 at 06:51
`validationexpression="[0-9a-zA-Z' ']{5,} ` for allowing only alpha numeric charactors and should be five digits there like wise how to specify for `-ve and +ve`? – Java Questions Nov 05 '12 at 06:53
what if i want to ignore case sensitive? – Java Questions Nov 05 '12 at 06:54

1 Answers1