JavaScript RegExp “g” flag not replacing every instance regexp g flag,regex g flag,regex g flag javascript,

I'm working on an EM to PX converter. Basically you paste in your code in the "PX" textarea, and then the same code will appear in the "EM" textarea with em values. It kinda works, but doesn't replace the value of all instances. For example: If you type "padding: 5px;" it will give you "padding: 0.313em;" successfully. However... if you put in "padding: 5px 4px;" it only replaces the "px" to "em" not the actual number values.

Try it out for yourself here :: http://jsfiddle.net/tJsNz/

        function pxToEm(){
        var px = document.getElementById("px"),
            em = document.getElementById("em"),
            parent = document.getElementById("parent-font-size");

        var pxVal = px.value.match(/\d+/ig);
        var pxToEm = 1 / parent.value * pxVal;
        var pxToEmFixed = pxToEm.toFixed(3);
        var pxToEmAnswer = px.value.replace(pxVal, pxToEmFixed).replace(/px/ig, "em");

        em.value = pxToEmAnswer;
    }
Answer:1

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