$(document).ready(function(){
$("#main_nav_first").mouseenter(function() {
	$("#main_nav_h1").removeClass('main_nav_textbackg');
	$("#main_nav_h1").addClass('main_nav_h1_on');
	MM_swapImage('home','','images/nav_01_home_on.gif',1);
});

$("#main_nav_first").mouseleave(function() {
	$("#main_nav_h1").removeClass('main_nav_h1_on');
	$("#main_nav_h1").addClass('main_nav_textbackg');
	MM_swapImage('home','','images/nav_01_home_off.gif',1);
});

$("#main_nav_second").mouseenter(function() {
	$("#main_nav_h2").removeClass('main_nav_textbackg');
	$("#main_nav_h2").addClass('main_nav_h2_on');
	MM_swapImage('whoweare','','images/nav_02_whoweare_on.gif',1);
});

$("#main_nav_second").mouseleave(function() {
	$("#main_nav_h2").removeClass('main_nav_h2_on');
	$("#main_nav_h2").addClass('main_nav_textbackg');
	MM_swapImage('whoweare','','images/nav_02_whoweare_off.gif',1);
});

$("#main_nav_third").mouseenter(function() {
	$("#main_nav_h3").removeClass('main_nav_textbackg');
	$("#main_nav_h3").addClass('main_nav_h3_on');
	MM_swapImage('whatwedo','','images/nav_03_whatwedo_on.gif',1);
});

$("#main_nav_third").mouseleave(function() {
	$("#main_nav_h3").removeClass('main_nav_h3_on');
	$("#main_nav_h3").addClass('main_nav_textbackg');
	MM_swapImage('whatwedo','','images/nav_03_whatwedo_off.gif',1);
});

$("#main_nav_fourth").mouseenter(function() {
	$("#main_nav_h4").removeClass('main_nav_textbackg');
	$("#main_nav_h4").addClass('main_nav_h4_on');
	MM_swapImage('ourwork','','images/nav_04_ourwork_on.gif',1);
});

$("#main_nav_fourth").mouseleave(function() {
	$("#main_nav_h4").removeClass('main_nav_h4_on');
	$("#main_nav_h4").addClass('main_nav_textbackg');
	MM_swapImage('ourwork','','images/nav_04_ourwork_off.gif',1);
});

$("#main_nav_ourethics").mouseenter(function() {
	$("#main_nav_h5_1").removeClass('main_nav_textbackg');
	$("#main_nav_h5_1").addClass('main_nav_h5_1_on');
	MM_swapImage('ourethics','','images/nav_04-01_ourethics_on.gif',1);
});

$("#main_nav_ourethics").mouseleave(function() {
	$("#main_nav_h5_1").removeClass('main_nav_h5_1_on');
	$("#main_nav_h5_1").addClass('main_nav_textbackg');
	MM_swapImage('ourethics','','images/nav_04-01_ourethics_off.gif',1);
});

$("#main_nav_fifth").mouseenter(function() {
	$("#main_nav_h5").removeClass('main_nav_textbackg');
	$("#main_nav_h5").addClass('main_nav_h5_on');
	MM_swapImage('ournews','','images/nav_05_ournews_on.gif',1);
});

$("#main_nav_fifth").mouseleave(function() {
	$("#main_nav_h5").removeClass('main_nav_h5_on');
	$("#main_nav_h5").addClass('main_nav_textbackg');
	MM_swapImage('ournews','','images/nav_05_ournews_off.gif',1);
});

$("#main_nav_sixth").mouseenter(function() {
	$("#main_nav_h6").removeClass('main_nav_textbackg');
	$("#main_nav_h6").addClass('main_nav_h6_on');
	MM_swapImage('contactus','','images/nav_06_contactus_on.gif',1);
});

$("#main_nav_sixth").mouseleave(function() {
	$("#main_nav_h6").removeClass('main_nav_h6_on');
	$("#main_nav_h6").addClass('main_nav_textbackg');
	MM_swapImage('contactus','','images/nav_06_contactus_off.gif',1);
});

});