pic1= new Image(759,99); 
pic1.src="/images/img1_top.jpg"; 

pic2= new Image(759,99); 
pic2.src="/images/img2_top.jpg"; 

pic3= new Image(759,99); 
pic3.src="/images/img3_top.jpg"; 

pic4= new Image(759,99); 
pic4.src="/images/img4_top.jpg"; 

function fade_in(tog) {
if (tog==1) { 
document.images['fade-pic'].src = "/images/img"+(tog)+"_top.jpg"; 
document.getElementById(tog).className = "img2over";

document.getElementById(2).className = "img2";
document.getElementById(3).className = "img2";
document.getElementById(4).className = "img2";
}

if (tog==2) { 
document.images['fade-pic'].src = "/images/img"+(tog)+"_top.jpg"; 
document.getElementById(tog).className = "img2over";

document.getElementById(1).className = "img3";
document.getElementById(3).className = "img2";
document.getElementById(4).className = "img2";
}

if (tog==3) { 
document.images['fade-pic'].src = "/images/img"+(tog)+"_top.jpg"; 
document.getElementById(tog).className = "img2over";

document.getElementById(1).className = "img3";
document.getElementById(2).className = "img2";
document.getElementById(4).className = "img2";
}

if (tog==4) { 
document.images['fade-pic'].src = "/images/img"+(tog)+"_top.jpg"; 
document.getElementById(tog).className = "img2over";

document.getElementById(1).className = "img3";
document.getElementById(2).className = "img2";
document.getElementById(3).className = "img2";
}
}

function fade_out(tog) {
document.getElementById(1).className = "img3";
document.getElementById(2).className = "img2";
document.getElementById(3).className = "img2";
document.getElementById(4).className = "img2";
document.images['fade-pic'].src = "/images/img"+0+"_top.jpg"; 
}