javascript extract number from string

"1.23-45/6$7.8,9".replace(/[^0-9]/g,'')

// Response: "123456789"// Html: <span id="foo">280ms</span>

var text = $('#foo').text();
var number = parseInt(text, 10);
alert(number);

// parseInt('ms120'.replace(/[^0-9\.]/g, ''), 10);var regex = /\d+/g;
var string = "Any string you want!";
var matches = string.match(regex);  // creates array from matches

if (matches){
  // There is a digit in the string.
} else {
  // No Digits found in the string.
} thenum = "foo3bar5".match(/\d+/)[0] // "3"