if (document.images) {
	/*
	// HEADER //
	var btn_top_01_off = new Image();
		btn_top_01_off.src = "images/btns_top/btn_top_01_off.jpg";
	var btn_top_01_on = new Image();
		btn_top_01_on.src = "images/btns_top/btn_top_01_on.jpg";
		
	var btn_top_02_off = new Image();
		btn_top_02_off.src = "images/btns_top/btn_top_02_off.jpg";
	var btn_top_02_on = new Image();
		btn_top_02_on.src = "images/btns_top/btn_top_02_on.jpg";		
		
	var btn_top_03_off = new Image();
		btn_top_03_off.src = "images/btns_top/btn_top_03_off.jpg";
	var btn_top_03_on = new Image();
		btn_top_03_on.src = "images/btns_top/btn_top_03_on.jpg";			
			
	var btn_top_04_off = new Image();
		btn_top_04_off.src = "images/btns_top/btn_top_04_off.jpg";
	var btn_top_04_on = new Image();
		btn_top_04_on.src = "images/btns_top/btn_top_04_on.jpg";			
			
	var btn_top_05_off = new Image();
		btn_top_05_off.src = "images/btns_top/btn_top_05_off.jpg";
	var btn_top_05_on = new Image();
		btn_top_05_on.src = "images/btns_top/btn_top_05_on.jpg";

	var btn_top_06_off = new Image();
		btn_top_06_off.src = "images/btns_top/btn_top_06_off.jpg";
	var btn_top_06_on = new Image();
		btn_top_06_on.src = "images/btns_top/btn_top_06_on.jpg";

	// CIERRA HEADER //	
	*/
	var next_arrow_off = new Image();
		next_arrow_off.src = "images/btns/next_arrow_off.jpg";
	var next_arrow_on = new Image();
		next_arrow_on.src = "images/btns/next_arrow_on.jpg";

		var prev_arrow_off = new Image();
		prev_arrow_off.src = "images/btns/prev_arrow_off.jpg";
	var prev_arrow_on = new Image();
		prev_arrow_on.src = "images/btns/prev_arrow_on.jpg";



	// HEADER //
	var btn_top_01_off = new Image();
		btn_top_01_off.src = "images/btns_top/btn_top_01_off.png";
	var btn_top_01_on = new Image();
		btn_top_01_on.src = "images/btns_top/btn_top_01_on.png";
		
	var btn_top_02_off = new Image();
		btn_top_02_off.src = "images/btns_top/btn_top_02_off.png";
	var btn_top_02_on = new Image();
		btn_top_02_on.src = "images/btns_top/btn_top_02_on.png";		
		
	var btn_top_03_off = new Image();
		btn_top_03_off.src = "images/btns_top/btn_top_03_off.png";
	var btn_top_03_on = new Image();
		btn_top_03_on.src = "images/btns_top/btn_top_03_on.png";			
			
	var btn_top_04_off = new Image();
		btn_top_04_off.src = "images/btns_top/btn_top_04_off.png";
	var btn_top_04_on = new Image();
		btn_top_04_on.src = "images/btns_top/btn_top_04_on.png";			
			
	var btn_top_05_off = new Image();
		btn_top_05_off.src = "images/btns_top/btn_top_05_off.png";
	var btn_top_05_on = new Image();
		btn_top_05_on.src = "images/btns_top/btn_top_05_on.png";

	var btn_top_06_off = new Image();
		btn_top_06_off.src = "images/btns_top/btn_top_06_off.png";
	var btn_top_06_on = new Image();
		btn_top_06_on.src = "images/btns_top/btn_top_06_on.png";

	// CIERRA HEADER //	
	


	
}


function entra(imagen) { 
	if (document.images) {
		document.images[imagen].src =  eval(imagen+"_on.src");   
	}
}

function sale(imagen) {
	if (document.images) {
		document.images[imagen].src = eval(imagen+"_off.src");   
	}
}

function entrapng(imagen) { 
	if (document.images) {
		document.images[imagen].src =  eval(imagen+"_on.src");   
	}
}

function salepng(imagen) {
	if (document.images) {
		document.images[imagen].src = eval(imagen+"_off.src");   
	}
}