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The moose likes HTML, CSS and JavaScript and the fly likes validating if the input value is float?? Big Moose Saloon
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validating if the input value is float??

rammie singh
Ranch Hand

Joined: Mar 26, 2009
Posts: 116
Hi ..... i want to make a validation for my input text..whether it is float or not...
How can i do it through javascript.

please help.

i tried doing something like this...

and my javascript function is..

but on my jsp page it gives error saying an object is expected..
please help ... although the alert staement in the function that is alert("float value is.."+floatValue); is getting printed fine
David Newton

Joined: Sep 29, 2008
Posts: 12617

*All* text input values are just that: text. You'd need to check against a regular expression, or maybe try converting it and checking for failure--but that may be error-prone.

Also, note that isFloat() is actually Number.isFloat(), not a standalone function.
I agree. Here's the link:
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