<!--
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  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);
  if(!x && d.getElementById) x=d.getElementById(n); 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];}
}

function getElementsByClassName(needle) { 
   var my_array = document.getElementsByTagName("*"); 
   var retvalue = new Array(); 
   var i; 
   var j; 

   for (i=0,j=0;i<my_array.length;i++) { 
      var c = " " + my_array[i].className + " "; 
      if (c.indexOf(" " + needle + " ") != -1) retvalue[j++] = my_array[i]; 
   } 
   return retvalue; 
} 

var classname = 'contenido1'; 
function toggle() 
{ 
   var divs = getElementsByClassName(classname) 
   for(i=0; i <divs.length;i++) 
   { 
      if(divs[i].className == 'contenido1') 
      { 
         divs[i].className = 'contenido2'; 
         classname = 'contenido2'; 
      } 
      else 
      { 
		  if(divs[i].className == 'contenido2') 
		  { 
			 divs[i].className = 'contenido3'; 
			 classname = 'contenido3'; 
		  } 
		  else
		  { 
			 divs[i].className = 'contenido1'; 
			 classname = 'contenido1'; 
		  } 
		  
      } 
   } 
   //alert(classname); 
} 
//-->