//sub menu show or not
function layer_view (layer_name, layer_display){
	if (layer_display == "view"){
		document.getElementById(layer_name).style.display = "block" ;
	} else {
		document.getElementById(layer_name).style.display = "none" ;
	}
}

function layer_swap (view_name, hide_display){
		document.getElementById(view_name).style.display = "block" ;
		document.getElementById(hide_display).style.display = "none" ;
}


// RollOver
function imageOver(imgs) {
	imgs.src = imgs.src.replace("off.gif", "on.gif");
}
function imageOut(imgs) {
	imgs.src = imgs.src.replace("on.gif", "off.gif");
//  onmouseover="imageOver(this);" onmouseout="imageOut(this);"
}