// Demonstrate calling external programs, by Warren E. Downs (2018)
    // Based on examples by Steve Garman
    // Version that works without busybox installed
    // This program also demonstrates using Asynchronous Callbacks
    // to continue processing once the result of the external program
    // is received.
    //////////////////////////////////////////////////////////
 
    function parseKb(item) {
        //alert('item='+item);
        var mult=1;
        if(item.indexOf('G') > -1) { mult=1024*1024; }
        if(item.indexOf('M') > -1) { mult=1024; }
        if(item.indexOf('K') > -1) { mult=1; }
        return parseFloat(item)*mult;
    }
 
    //////////////////////////////////////////////////////////