function ToggleCSS() { 
var screenCSS = document.getElementById('screenCSS'); 
var printCSS = document.getElementById('printCSS'); 
if (screenCSS.flag == true) { 
screenCSS.href = screenCSS.oldhref; 
screenCSS.flag = false; 
//alert('When you are done printing, just click the \'printer friendly\' link again.'); 
} else { 
screenCSS.oldhref = screenCSS.href; 
screenCSS.href = printCSS.href; 
screenCSS.flag = true; 
} 
}