preloads=new Array("","nav_1","nav_2","nav_3","nav_4","nav_5");

	for (i=0;i<preloads.length;i++){
		eval('nav_'+i+'_0 = new Image();');
		eval('nav_'+i+'_0.src = "images/'+preloads[i]+'_0.gif";');
		eval('nav_'+i+'_1 = new Image();');
		eval('nav_'+i+'_1.src = "images/'+preloads[i]+'_1.gif";');
	}

	function swap(img,obj) {
		eval('document.getElementById(img).src = '+obj+'.src;');
	}