function highlight(id){
 thumb = document.getElementById("thumb_" + id);
 input = document.getElementById("image_" + id).value;
document.getElementById("thumb_1").style.border = "0px solid #000000";
document.getElementById("thumb_2").style.border = "0px solid #000000";
document.getElementById("thumb_3").style.border = "0px solid #000000";
document.getElementById("thumb_1").style.margin = "2px";
document.getElementById("thumb_2").style.margin = "2px";
document.getElementById("thumb_3").style.margin = "2px";
document.getElementById("image_1").value = 0;
document.getElementById("image_2").value = 0;
document.getElementById("image_3").value = 0;

if (input == 0){
document.getElementById("thumb_" + id).style.border = "2px solid #FF0000";
document.getElementById("image_" + id).value = 1;
document.getElementById("thumb_" + id).style.margin = "0px";
}else{
document.getElementById("thumb_" + id).style.border = "0px solid #000000";
document.getElementById("image_" + id).value = 0;
document.getElementById("thumb_" + id).style.margin = "2px";

}
	}