$(document).ready( function() {
  
	$(".header #nav_main1 a").mouseover( function() {
	  $(this).parent().find("span.arw").animate({marginLeft:'0px', opacity:'1'}, "fast");
	});
    
	$(".header #nav_main1 a").mouseout( function() {
      $(this).parent().find("span.arw").animate({marginLeft:'-8px', opacity:'-1'}, "fast");	  
	});
		
	$(".header #nav_main2 a").mouseover( function() {
	  $(this).parent().find("span.arw").animate({marginLeft:'0px', opacity:'1'}, "fast");
	});
    
	$(".header #nav_main2 a").mouseout( function() {
      $(this).parent().find("span.arw").animate({marginLeft:'-6px', opacity:'-1'}, "fast");	  
	});
	
}); // end of document ready