img = new Array();
img_off = new Array();
sub_img = new Array();
sub_img_off = new Array();

if (document.images) {
	
	// headers
	
	img_header = new Image();
	img_header.src ="img/header/foto_"+act_page+"_2a_over.gif";  
	img_header_off = new Image();
	img_header_off.src ="img/header/foto_"+act_page+"_2a.gif";
	img_head = new Array();
	img_head_off = new Array();
	
	// header buttons
	
	img_head[2] = new Image();
	img_head[2].src ="img/menu_jaarmagazine_over.gif";  
	img_head_off[2] = new Image();
	img_head_off[2].src ="img/menu_jaarmagazine.gif";
	
	img_head[3] = new Image();
	img_head[3].src ="img/menu_downloads_over.gif";  
	img_head_off[3] = new Image();
	img_head_off[3].src ="img/menu_downloads.gif";
	
}

function set_headmenu(headmenu) {
	// leftmenu
	for (i=1;i<headmenu.length;i++) {
		//if (i != act_page) {
			img[headmenu[i]] = new Image();
			img[headmenu[i]].src ="img/menu/"+headmenu[i]+"_over.gif";
			img_off[headmenu[i]] = new Image();
			img_off[headmenu[i]].src ="img/menu/"+headmenu[i]+".gif";
		//}
	}
}

function set_submenu(submenu) {
	// leftmenu
	for (i=1;i<submenu.length;i++) {
		//if (i != act_page) {
			sub_img[submenu[i]] = new Image();
			sub_img[submenu[i]].src ="img/menu/"+submenu[i]+"_over.gif";
			sub_img_off[submenu[i]] = new Image();
			sub_img_off[submenu[i]].src ="img/menu/"+submenu[i]+".gif";
		//}
	}
}


function swap_img_on(imgName) {
	if (document.images) {
		//if (imgName != act_page) {
			imgOn = img[imgName].src;
			document.getElementById("img_"+imgName).src= imgOn;
		//}	
	}
}

function swap_img_off(imgName) {
	if (document.images) {
		if (imgName != act_page) {
			imgOff = img_off[imgName].src;
			document.getElementById("img_"+imgName).src= imgOff;
		}
	}
}

function swap_subimg_on(imgName) {
	if (document.images) {
		imgOn = sub_img[imgName].src;
		document.getElementById("subimg_"+imgName).src= imgOn;
	}
}

function swap_subimg_off(imgName) {
	if (document.images) {
		
			imgOff = sub_img_off[imgName].src;
			document.getElementById("subimg_"+imgName).src= imgOff;
	}
	
}

function swap_header_img_on() {
		if (document.images) {
			imgOn = img_header.src;
			document.getElementById("img_header").src= imgOn;	
		}
	}
	
function swap_header_img_off() {
	if (document.images) {
		imgOff = img_header_off.src;
		document.getElementById("img_header").src= imgOff;
	}
}

function swap_head_img_on(nr) {
	if (document.images) {
		imgOn = img_head[nr].src;
		document.getElementById("img_head_"+nr).src= imgOn;	
	}
}

function swap_head_img_off(nr) {
	if (document.images) {
		imgOff = img_head_off[nr].src;
		document.getElementById("img_head_"+nr).src= imgOff;
	}
}