var isDOM=document.getElementById?1:0;
var isIE=document.all?1:0;
var isNS4=navigator.appName=='Netscape'&&!isDOM?1:0;

var preloaded = new Array(); 
 function preload_images() { 
     for (var i = 0; i < arguments.length; i++){ 
         preloaded[i] = document.createElement('img'); 
         preloaded[i].setAttribute('src',arguments[i]); 
     }; 
 }; 
 
 preload_images( 
	 'images/sc_logo.gif',
 	 'images/menu/about_off.gif',
	 'images/menu/about_on.gif',
	 'images/menu/spacer.gif',
	 'images/menu/bg.gif',
	 'images/menu/contact_off.gif',
	 'images/menu/contact_on.gif',
	 'images/menu/home_off.gif',
	 'images/menu/home_on.gif',
	 'images/menu/orders_off.gif',
	 'images/menu/orders_on.gif',
	 'images/menu/products_off.gif',
	 'images/menu/products_on.gif',
	 'images/menu/search_off.gif',
	 'images/menu/search_on.gif',
	 'images/menu/technical_off.gif',
	 'images/menu/technical_on.gif',
	 'images/btn/btn_submit_off.jpg',
	 'images/btn/btn_submit_on.jpg',
	 'images/box/box_left.gif',
	 'images/box/box_left_btm.gif',
	 'images/box/box_top.gif',
	 'images/box/box_top_left.gif',
	 'images/box/box_top_right.gif',
	 'images/box/tit_line.gif'
 );