var selected = -1;
var index = -1;
var a = [false, false, false, false, false, false, false];
$(document).ready(function(){
	if ($("a.selected").parent().attr("id") != null) {
	    selected = parseInt($("a.selected").parent().attr("id").charAt(3)) - 1;
	    a[selected] = true;  
	}
    });

function addHover() { 
    if ($(this).attr("class") != null)
	index = parseInt($(this).attr("class").split("_")[1]) - 1;
    if (index > -1) {
        $("img.navElement").each(function(i){   
		if (i != selected) 
		    replaceSrc("1", i);
		else
		    replaceSrc("3", i); 
		a[i] = false;
	    });
        replaceSrc("2", index); 
    } 
}

function removeHover() { 
    if (index > -1) {
	if (a[index] && index != selected) 
	    replaceSrc("1", index);
        else if (a[index])
	    replaceSrc("3", index);
        a[index] = !a[index];
    }
}

function replaceSrc(s, i) { 
    var element = $("img.navElement:eq(" + i + ")");
    var src = $(element).attr("src");
    src = src.substring(0, src.length - 5) + s + ".gif";
    $(element).attr("src", src);
}