ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false


function mostrar(obj) {
	if (ns4) obj.visibility = "show"
	else  obj.visibility = "visible"
}

function ocultar(obj) {
	if (ns4) obj.visibility = "hide"
	else  obj.visibility = "hidden"
}

function imprimir(){
if (!window.print){
alert("Este boton solo funciona en navegadores Netscape. Imprima la ventana usando el menu del navegador")
return
}
window.print()
}



function MM_findObj(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
var esto;


function incluircapa(nombrecapa, nombrevar)
{
if (document.getElementById){eval (nombrevar+"= document.getElementById('"+nombrecapa+"').style");}
else if (document.all){eval(nombrevar+"= document.all." +nombrecapa+ ".style");}
else if (document.layers){eval(nombrevar+"= document."+nombrecapa);}
}