//preload function
function preL(){

	if (document.images) {
	
	
	Mnav1 = newImage('http://www.nrgenergy.com/assets/sub/home.gif');
	Mnav2 = newImage('http://www.nrgenergy.com/assets/sub/media.gif');
	Mnav3 = newImage('http://www.nrgenergy.com/assets/sub/careers.gif');
	Mnav4 = newImage('http://www.nrgenergy.com/assets/sub/contactUs.gif');
	Mnav5 = newImage('http://www.nrgenergy.com/assets/sub/locations.gif');
	Mnav6 = newImage('http://www.nrgenergy.com/assets/sub/investor.gif');	
	Mnav7 = newImage('http://media.corporate-ir.net/media_files/IROL/12/121544/NRG_enviro.jpg');	
	Mnav8 = newImage('http://media.corporate-ir.net/media_files/IROL/12/121544/NRG_glob-give.jpg');	

	Mnav1_o = newImage('http://www.nrgenergy.com/assets/sub/home_o.gif');
	Mnav2_o = newImage('http://www.nrgenergy.com/assets/sub/media_o.gif');
	Mnav3_o = newImage('http://www.nrgenergy.com/assets/sub/careers_o.gif');
	Mnav4_o = newImage('http://www.nrgenergy.com/assets/sub/contactUs_o.gif');
	Mnav5_o = newImage('http://www.nrgenergy.com/assets/sub/locations_o.gif');
	Mnav6_o = newImage('http://www.nrgenergy.com/assets/sub/investor_o.gif');
	Mnav7_o = newImage('http://media.corporate-ir.net/media_files/IROL/12/121544/NRG_enviro_o.jpg');
	Mnav8_o = newImage('http://media.corporate-ir.net/media_files/IROL/12/121544/NRG_glob-give_o.jpg');

	nav1_0 = newImage('http://www.nrgenergy.com/assets/hm/nav1_0.gif');
	nav1_1 = newImage('http://www.nrgenergy.com/assets/hm/nav1_1.gif');
	nav1_2 = newImage('http://www.nrgenergy.com/assets/hm/nav1_2.gif');
	nav1_3 = newImage('http://www.nrgenergy.com/assets/hm/nav1_3.gif');
	nav1_4 = newImage('http://www.nrgenergy.com/assets/hm/nav1_4.gif');
	nav1_5 = newImage('http://www.nrgenergy.com/assets/hm/nav1_5.gif');
	nav1_7 = newImage('http://www.nrgenergy.com/assets/hm/nav1_7.gif');

	nav1_0_o = newImage('http://www.nrgenergy.com/assets/hm/nav1_0_o.gif');
	nav1_1_o = newImage('http://www.nrgenergy.com/assets/hm/nav1_1_o.gif');
	nav1_2_o = newImage('http://www.nrgenergy.com/assets/hm/nav1_2_o.gif');
	nav1_3_o = newImage('http://www.nrgenergy.com/assets/hm/nav1_3_o.gif');
	nav1_4_o = newImage('http://www.nrgenergy.com/assets/hm/nav1_4_o.gif');
	nav1_5_o = newImage('http://www.nrgenergy.com/assets/hm/nav1_5_o.gif');
	nav1_7_o = newImage('http://www.nrgenergy.com/assets/hm/nav1_7_o.gif');
	}
}