function PNG_loader() { 
   for(var i=0; i<document.images.length; i++) { 
      var img = document.images[i]; 
      var imgName = img.src.toUpperCase(); 
      if (imgName.substring(imgName.length-3, imgName.length) == "PNG") { 
         var imgID = (img.id) ? "id='" + img.id + "' " : ""; 
         var imgClass = (img.className) ? "class='" + img.className + "' " : ""; 
         var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "; 
         var imgStyle = "display:inline-block;" + img.style.cssText; 
         if (img.align == "left") imgStyle += "float:left;"; 
         if (img.align == "right") imgStyle += "float:right;"; 
         if (img.parentElement.href) imgStyle += "cursor:hand;"; 
         var strNewHTML = "<span " + imgID + imgClass + imgTitle 
            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";" 
            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" 
            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>"; 
         img.outerHTML = strNewHTML; 
         i--; 
      } 
   } 
} 
window.attachEvent("onload", PNG_loader); 
function validar(){
	if (document.xyz.email.value==""){
		alert("Por favor, introduzca su Email para poder contestarle");
		document.xyz.email.focus();
		return false;
	}
	if (document.xyz.msg.value==""){
		alert("Por favor, indíquenos qué desea");
		document.xyz.msg.focus();
		return false;
	}
	document.xyz.submit();	
}
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];}
}