Extract number from string with RegExp

[Claus Mygind]

I need an example that will extract a decimal number from a string using RegExp

sample data would look something like this

"US,GS 0.0 g↵"
",GS 164.3 g↵"

and if no number is found I would want to return false
"↵"

[Claus Mygind]

Not pretty, but at least this seems to work fine

In the replace method below all characters not matching 0 to 9 or . are stripped from the msg and displayed in my output.

function dispWeight(msg) {
	document.getElementById("curWeight").innerHTML = msg.replace( /[^.0123456789]/g,"");
	}

The RexExps is /[^.0123456789]/g
The ^ says exclude these characters
The [ ] says anything included here.
The g say repeat for the entire string