// JavaScript Document
function toggleLayer(whichLayer)
{
if (document.getElementById)
{
// this is the way the standards work
var style2 = document.getElementById(whichLayer).style;
style2.display = style2.display? "":"block";
toggle('earwig','images/show_copy.gif','images/hide_copy.gif');return(false);
}
else if (document.all)
{
// this is the way old msie versions work
var style2 = document.all[whichLayer].style;
style2.display = style2.display? "":"block";
toggle('earwig','images/show_copy.gif','images/hide_copy.gif');return(false);
}
else if (document.layers)
{
// this is the way nn4 works
var style2 = document.layers[whichLayer].style;
style2.display = style2.display? "":"block";
toggle('earwig','images/show_copy.gif','images/hide_copy.gif');return(false);
}
}

function toggle(imagename,src1,src2){      
    if(document.images && document.images[imagename]){
        image1=new Image;
        image1.src=src1;
        if(document.images[imagename].src != image1.src){
            document.images[imagename].src = image1.src
        }
        else{
            document.images[imagename].src=src2
        }
    }
}