document.write("<style>");
document.write("@media screen {");
document.write(".tab_on {display: block;}");
document.write(".tab_off {display: none;}");
document.write("}");

document.write("@media print {");
document.write(".tab_on  {display: block;}");
document.write(".tab_off {display: block;}");
document.write("}");
document.write("</style>");

function tabDisplay(contentParent, contentChild) {
	var layers = document.getElementById(contentParent).getElementsByTagName('div');
	for(var i=0; i<layers.length; i++){
		if(layers[i].parentNode.id == contentParent) {
			if(contentChild) {
				layers[i].className = "tab_off";
			} else {
				layers[i].className = "tab_on";
			}
		}
	}

	if(document.getElementById(contentChild)) {
		document.getElementById(contentChild).className = "tab_on";
	}

	return false;	
}