$(document).ready(function(){
		$('.nav_roll').hover(function(){
			if(curr_s_nav != $(this).attr('id') && curr_s_s_nav != $(this).attr('id') && curr_m_nav != $(this).attr('id'))
			{
			var s = $(this).attr('src');
			var img_pos = s.lastIndexOf('/');
			var img_name = s.substring(img_pos);
			var img_name_new = img_name.replace('_off', '_on');
			s = s.replace(img_name, img_name_new);
			$(this).attr('src', s);
			}
		}, function(){
			if(curr_s_nav != $(this).attr('id') && curr_s_s_nav != $(this).attr('id') && curr_m_nav != $(this).attr('id'))
			{
				var s = $(this).attr('src');
				var img_pos = s.lastIndexOf('/');
				var img_name = s.substring(img_pos);
			
				var img_name_new = img_name.replace('_on', '_off');
				s = s.replace(img_name, img_name_new);
				$(this).attr('src', s);
			}
		}//end mouse out
		);//.nav_roll.hover
		

		var url = window.location.href;
		var page_pos = url.lastIndexOf('/');
		var page_name = url.substring(page_pos+1);
    var page_name = page_name.substring(0, page_name.length-5);
    if(page_name == '') page_name = 'home';
    if(s)
    {
		var s = $('#nav_'+page_name).attr('src');
		var img_pos = s.lastIndexOf('/');
		var img_name = s.substring(img_pos);
		var img_name_new = img_name.replace('_off', '_on');
		s = s.replace(img_name, img_name_new);
 		$('#nav_'+page_name).attr('src', s);
    }
    
	});//document.ready
  
  function set_nav(page_name)
  {
    var s = $('#'+page_name).attr('src');
		var img_name = s;
		var img_name_new = img_name.replace('_off', '_on');
		s = s.replace(img_name, img_name_new);
 		$('#'+page_name).attr('src', s);
  }