Remove all characters from string javascript
<pre><code>$('.hourfield').focusout(function() {

    var h;
    var m;
    var timeStr = "";
    var time = "";
    var newFormat = "";

    timeStr = $(this).val();

    //Here I would like to remove all characters which isn't numbers
    timeStr = timeStr.replace("/[^0-9\.]+/g","");

    if(timeStr &gt; 0) {

        h = timeStr.substr(0,2);
        m = timeStr.substr(2,2);

        newFormat = h+':'+m;

        //Add new values
        $(this).val(newFormat);
    }

});
</code></pre>

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