var k = 1,tiempo = 0,b_sel = 9999,old_sel_tipo="-",old_sel_num=0,selected_num=-1;
var Mozilla, Explorer;

Mozilla = (document.layers) ? 1:0
Explorer = (document.all) ? 1:0

function carga_der(page) {
	
   hide_izq();
   hide_main();
   hide_der();

   if (Mozilla) document.textD.src = page
   else if (Explorer) parent.menu_der.document.location = page

   show_der();

}

function carga_izq(page) {
    hide_izq();

    if (Mozilla) document.text_izq.src = page
    else if (Explorer) parent.menu_izq.document.location = page
    show_izq();

}

function show_izq() {
	if (Mozilla) document.text_izq.visibility = "show"
	if (Explorer) parent.text_izq.style.visibility = "visible"
}

function show_der() {
	if (Mozilla) document.text_der.visibility = "show"
	if (Explorer) text_der.style.visibility = "visible"
}

function hide_der() {
	if (Mozilla) document.text_der.visibility = "hide"
	if (Explorer) parent.text_der.style.visibility = "hidden"
}

function hide_izq() {
	if (Mozilla) document.text_izq.visibility = "hide"
	if (Explorer) parent.text_izq.style.visibility = "hidden"
}

function carga_main(page) {
    hide_main();
	if (Mozilla) document.text_main.src = page
	else if (Explorer) parent.menu_main.document.location = page
    show_main();
}

function hide_main() {
	if (Mozilla) {
		document.text_ult.visibility = "hide"
		document.text_main.visibility = "hide"
	}
	if (Explorer) {
		parent.text_ult.style.visibility = "hidden";
		parent.text_main.style.visibility = "hidden";
		}
}

function show_main() {
	if (Mozilla) {
		document.text_ult.visibility = "hide"
		document.text_main.visibility = "show"
	}
	if (Explorer) {
		parent.text_ult.style.visibility = "hidden";
		parent.text_main.style.visibility = "visible"
	}
}

function hide_text(num) {

if (selected_num!=num) {

b_sel=9999;	

	if (Mozilla)  {
		document.eval("boton"+num).visibility = "show"
		document.eval("texto"+num).visibility = "hide"
  }
	if (Explorer) { 
		parent.eval("boton"+num).style.visibility = 'visible';
		parent.eval("texto"+num).style.visibility = 'hidden';
	}
	
}
return true;

}

function show_text(num) {
	if (Mozilla)  {
		document.eval("boton"+num).visibility = "hide"
		document.eval("texto"+num).visibility = "show"
  }
	if (Explorer) { 
		parent.eval("boton"+num).style.visibility = 'hidden';
		parent.eval("texto"+num).style.visibility = 'visible';
	}

b_sel=num;	
return true;

}

function select_text(num) {
	
  tmp_num=selected_num; 
	selected_num = num;
	hide_text(tmp_num);
	
}