(function($) {

$(document).ready(function() {

	var xmlPath = './xml/file_list.xml';

	$.ajax({
		url: xmlPath,
		dataType: 'xml',
		success: drawGraphic
	});

	function drawGraphic(xml){
		var cntMax = $(xml).find('src').size();
		var randomNum = Math.floor(Math.random() * cntMax);
		var docSrc = '<img src="' + $(xml).find('src').eq(randomNum).text() + '" />';
		$('p.main_graphic').html(docSrc);
	}

});

})(jQuery);