function promobaseImage(src, alt) {
	this.src = src;
	this.alt = alt;
}

var randombaseImages = new Array();
var i=0;
randombaseImages[i] = new promobaseImage('images/main_image_home1.jpg', 'Banner: jerichoproject.com.au'); i++;
randombaseImages[i] = new promobaseImage('images/main_image_home2.jpg', 'Banner: jerichoproject.com.au'); i++;
randombaseImages[i] = new promobaseImage('images/main_image_home3.jpg', 'Banner: jerichoproject.com.au'); i++; 

var whichbaseimage=Math.floor(Math.random()*(randombaseImages.length))

var imagebaseTag = '<IMG src="'+randombaseImages[whichbaseimage].src+'" alt="'+randombaseImages[whichbaseimage].alt+'" height="354" width="593" border="0">';