var id = "cell0";
var gid = "cell80";
var selected_color = "#f3f3f3";
var deselected_color = "#fff";
var activated = false;

function highlight(id) {
	if (gid != id) {
		document.getElementById(id).style.background = selected_color;
		if (activated == true) {
			document.getElementById(gid).style.background = deselected_color;
		}
		gid = id;
		activated = true;
	}
}
function toggle(id) {
	var visible = document.getElementById(id).value;
	var currentval = id + 100;
	var val = id + 200;
	var gridval = document.getElementById(val).value;
	if (visible == 1) {
		document.getElementById(id).value = 0;
		document.getElementById(currentval).value = gridval;
	} else if (visible == 0) {
		document.getElementById(id).value = 1;
		document.getElementById(currentval).value = "";
	}
}