function pop(page,top,left,width,height,resize,scroll,fullscreen){
	win1 = eval("window.open('" + page + "','popup','top=" + top + ",left=" + left + ",width=" + width + ",height=" + height + ",resizable=" + resize + ",scrollbars=" + scroll + "');")
}
function  showNav(idName) {
	if(document.getElementById) {
		document.getElementById(idName).style.visibility = 'visible';
	}
}
function  hideNav(idName) {
	if(document.getElementById) {
		document.getElementById(idName).style.visibility = 'hidden';
	}
}