Here is a jQuery script to make an API call from your own application

getBiblejQueryScript

jQuery.ajax({
    url:'https://archived.getbible.net/json',
    dataType: 'jsonp',
    data: 'p=John1&v=kjv',
    jsonp: 'getbible',
    success:function(json){
        // set text direction
        if (json.direction == 'RTL'){
        	var direction = 'rtl';
        } else {
        	var direction = 'ltr'; 
        }
        // check response type
        if (json.type == 'verse'){
            var output = '';
            	jQuery.each(json.book, function(index, value) {
                	output += '<center><b>'+value.book_name+' '+value.chapter_nr+'</b></center><br/><p class="'+direction+'">';
                    jQuery.each(value.chapter, function(index, value) {
                        output += '  <small class="ltr">' +value.verse_nr+ '</small>  ';
                        output += value.verse;
                        output += '<br/>';
                    });
                    output += '</p>';
            	});
            jQuery('#scripture').html(output);  // <---- this is the div id we update
        } else if (json.type == 'chapter'){
            var output = '<center><b>'+json.book_name+' '+json.chapter_nr+'</b></center><br/><p class="'+direction+'">';
            jQuery.each(json.chapter, function(index, value) {
                output += '  <small class="ltr">' +value.verse_nr+ '</small>  ';
                output += value.verse;
                output += '<br/>';
            });
            output += '</p>';
            jQuery('#scripture').html(output);  // <---- this is the div id we update
        } else if (json.type == 'book'){
            var output = '';
            jQuery.each(json.book, function(index, value) {
                output += '<center><b>'+json.book_name+' '+value.chapter_nr+'</b></center><br/><p class="'+direction+'">';
                jQuery.each(value.chapter, function(index, value) {
                    output += '  <small class="ltr">' +value.verse_nr+ '</small>  ';
                    output += value.verse;
                    output += '<br/>';
                });
            output += '</p>';
        });
        if(addTo){
        	jQuery('#scripture').html(output);  // <---- this is the div id we update
        }
      }
    },
    error:function(){
        jQuery('#scripture').html('<h2>No scripture was returned, please try again!</h2>'); // <---- this is the div id we update
     },
});

How to make the text shown in a floating window instead of replacing #scripture?

how is the addTo variable set?

This API has been abandoned... please look at the new API v2

I have written a BASH random scripture generator, and a easy way to get a chapter also with BASH, I am sure you can convert that to JavaScript.