con.js

function getInput(e){

    // only run if the user presses the enter key
    if(e.keyCode == 13){
        // validate input

        var userIn = document.getElementById("userInput").value;
        var soul = document.getElementById("sel");
        var vally = soul.options[soul.selectedIndex].value;
        var outFormat;

        if(document.getElementById("decimal").checked) outFormat = 10;
        else if(document.getElementById("hexidecimal").checked) outFormat = 16;
        else outFormat = 2;

        converter(vally, outFormat, userIn);
    }
};