function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
} 
$(document).ready(function(){
	var curImage;
	$('.home_nav a').click(function() {
		$('.home_nav a').removeClass('active');
		$(this).addClass('active');
		opacity('img'+curImage,100,0,1000);
		opacity('img'+$(this).attr('id'),0,100,1000);
		curImage = $(this).attr('id');
	});
	changeOpac(0,'img1');changeOpac(0,'img2');changeOpac(0,'img3');changeOpac(0,'img4');
	opacity('img1',0,100,1000);
	$('.banner .images').css('display','block');
	curImage = 1;
	setInterval('slideshow();','3000');
});
function slideshow() {
	x = $('.home_nav a.active').attr('id') % 4 + 1;
	$('.home_nav a#'+x).click();
}