function menuOn( elid ) {
  var el = document.getElementById( elid );
  el.className += ' ' + 'on_hover';
  
  var el = document.getElementById( elid + '_nav' );
  el.className += ' ' + 'on_nav';
  
}

function menuOff( elid ) {
  var el = document.getElementById( elid );
  el.className = el.className.replace( ' ' + 'on_hover', '' );
  
  var el = document.getElementById( elid + '_nav' );
  el.className = el.className.replace( ' ' + 'on_nav', '' );
}

var xhr;

function show_content( page, name ) {
  document.getElementById( page + '_content' ).innerHTML = document.getElementById( page + '_' + name ).innerHTML;
}

function popup(mylink, windowname) {	
	if (! window.focus)return true;
	var href;
	if (typeof(mylink) == 'string')
	   href=mylink;
	else
	   href=mylink.href;
	window.open(href, windowname, 'width=600,height=400,scrollbars=no');
	return false;
}

function popup1(mylink, windowname) {	
	if (! window.focus)return true;
	var href;
	if (typeof(mylink) == 'string')
	   href=mylink;
	else
	   href=mylink.href;
	window.open(href, windowname, 'width=600,height=600,scrollbars=no');
	return false;
}

function popup_shipping( url ) {	
	var w = window.open( url, ' ', ' width=600, height=200');
}

function popup_solutions( url ) {	
	var w = window.open( url, 'name');
}


function roll(img_name, img_src) {
	img_loc = "images/buttons/";
	img_src = img_loc + img_src;
    document[img_name].src = img_src;
}