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_openBrWindow(theURL,winName,features) {

  window.open(theURL,winName,features);

}

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 checkForm(objForm)
{
	var arClass, bValid;
	var objField = objForm.getElementsByTagName('*');
	var msg = 'Error, por favor complete los siguientes campos: \n';
	var err = false;

	//recorre todos los elementos del formulario
	for (var iFieldCounter=0; iFieldCounter<objField.length; iFieldCounter++)
	{
		arClass = objField[iFieldCounter].className.split(' ');
		for (var iClassCounter=0; iClassCounter<arClass.length; iClassCounter++)
		{
			switch (arClass[iClassCounter]){
				case 'string':
				   bValid = esString(objField[iFieldCounter].value.replace(/^\s*|\s*$/g, '')) && !esStringBlanco(objField[iFieldCounter].value.replace(/^\s*|\s*$/g, ''));
				   break;
				case 'number' :
				   bValid = esInt(objField[iFieldCounter].value);
				   break;
				case 'mail' :
				   bValid = esEmail(objField[iFieldCounter].value);
				     break;
				default:
				   bValid = true;
			}
			if (!bValid){
				//ERROR
				msg = msg + '- ' + objField[iFieldCounter].getAttribute('pantalla') + '\n';
				err = true;
			}
		}
	}
	if (!err){
		return true;
	}else{
		alert(msg);
		return false;
	}
}
function esString(strValue){
  return (typeof strValue == 'string' && strValue != '' && isNaN(strValue));
}
function esEmail(valor){
  if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(valor)){
   return (true)
  } else {
   return (false);
  }
}
function esStringBlanco(str){
	var espacios = true;
	var cont = 0;
	while (espacios && (cont < str.length)) {
	  if (str.charAt(cont) != " ") {
	    espacios = false;
	  }
	  cont++;
	}

	return espacios;
}
function esInt(str){
	var i = parseInt(str);
	if(isNaN(i)) return false;

	i = i.toString();
	if(i != str) return false;

	return true;
}
function alerta(txt){
	alert(txt);
}