// script for random displaying of leftbg image 
// on index.htm and index_n.php pages

/************** CONFIGURATION START *******************/
var IMG_COUNT = 6;
var IMG_DIR = "img/randomleftbg";
var BASE_IMG_NAME = "left-bg-";
/************** CONFIGURATION END *******************/

function getRandomBg() {
	 var ranNum = Math.round(Math.random()*(IMG_COUNT-1)) + 1;
	 
	 var img_name = IMG_DIR + '/' + BASE_IMG_NAME + ranNum + '.jpg';
	 
	 document.getElementById('leftbg').style.backgroundImage='url("' + img_name + '")';
}