You can try this. it will extract all number from any type of string.

var suffix = 'comment_like_6846511';
alert(suffix.replace(/[^0-9]/g,''));

DEMO

try:

var value=$('.price-old').val();
value=value.split(' ')[0];
alert(val);//just for check

Try this:

var num = document.getElementById('spanID').innerText.match(/\d+/)[0];

jQuery version:

var num = $('span').text().match(/\d+/)[0]; // or $('#spanID') to get to the span

If you want as numeric value (and not as string), use parseInt:

var num = parseInt($('span').text().match(/\d+/)[0], 10);

$(<Selector>).attr('class').split('_')[1];

NOTE I don't do any error-checking. And what is it you're trying to do (more explicitly), there's got to be a better way.

If the string is always going to look like this: "ch[num1]sl[num2]", you can easily get the numbers without a regex like so:

var numbers = str.substr(2).split('sl');
//chop off leading ch---/\   /\-- use sl to split the string into 2 parts.

In the case of "ch2sl4", numbers will look like this: ["2", "4"], coerce them to numbers like so: var num1 = +(numbers[0]), or numbers.map(function(a){ return +(a);}.

If the string parts are variable, this does it all in one fell swoop:

var str = 'ch2fsl4';
var numbers = str.match(/[0-9]+/g).map(function(n)
{//just coerce to numbers
    return +(n);
});
console.log(numbers);//[2,4]

This uses regular expressions and the exec method:

var s = "blabla blabla-5 amount-10 blabla direction-left";
var amount = parseInt(/amount-(\d+)/.exec(s)[1], 10);
var direction = /direction-([^\s]+)/.exec(s)[1];

The code will cause an error if the amount or direction is missing; if this is possible, check if the result of exec is non-null before indexing into the array that should be returned.

If your phone numbers always start with something like Tel:, Tel(1): etc you could, for example, consider simply splitting the whole string first using : (or a space) as separators. Like this:

telnom = dine[i].tel1;
telnom = telnom.split(":")[1].replace(/\D/g, '');

Try this instead:

alert($("#example").text().match(/\((-?\d+)\)/)[1]);​

That will capture negative numbers as well.

You can use parseInt for this, it will parse a string and remove any "junk" in it and return an integer.

As James Allardice noticed, the number must be before the string. So if it's the first thing in the text, it will work, else it won't.

-- EDIT -- Use with your example:

<p>123confirm</p>

<script type="text/javascript">
$(document).ready(function(){  
  $('p').click(function(){  
    var sd=$(this).text();  
    sd=parseInt(sd);
    alert(sd);
  });
});  
</script>

If your id always has "record" in front of it then...

$("a.removeTier").live('click', function() {
    var tier = $(this).attr('id').subString("6");
    alert(tier);
});

If you change the word "record" to something else just change the 6 the the position of the first number.

I aproached your problem by using JQuery to replace any character that isnt a number or a '.' (dot).

I created a few spans with values in like this:

<span>$4.10</span>
  <span>£7.76</span>
  <span>€23.44</span>

then created some JQuery to alert the values:

$("span").each(function(){
  var a = $(this).text().replace(/[^0-9.]/g, "");
  alert(a);  
});

Here is a JSFiddle you can mess with: http://jsbin.com/xelameki/1/edit/

I hope it helps =)

The code will fail in below cases:

1. Negative numbers
2. Decimal numbers
3. Units other than px(e.g. pt, %, vw, vh, ...)

Moreover, the numbers array contains space before numbers and an empty string at the end which is not required.

I recommend to use below regex to extract numbers from strings

/[+-]?\d+(?:\.\d+)?/g

1. [+-]?: Optional + or - sign before number
2. \d+: Match one or more numbers
3. (?:\.\d+)?: Optional decimal point. ?: denotes non-capturing group.
4. g flag: To get all matches

After the numbers are extracted from string, they can be converted to Number format.

var regex = /[+-]?\d+(?:\.\d+)?/g;

var str = `padding: 0;
font-size: 16pt;
width: 50%;
height: 20vh;
margin-right: 12px;
padding-right: -12.5px;`;

var match;
while (match = regex.exec(str)) {
  console.log(match[0]);
}

Here's online demo of the regex on Regex101.

RegEx perhaps?

$('.Price').text().replace(/[^0-9]/gi, '');
 var number = parseInt(Price, 10);
 $('.SRPRef').text().replace(/[^0-9]/gi, '');
 var number2 = parseInt(SRPRef, 10);