function AbrirCentrado(theURL,winName,features,ancho,alto)
{
	neu=window.open(theURL,winName,features);
	neu.focus()
	neu.moveTo(Math.round((screen.availWidth-ancho)/2),Math.round((screen.availHeight-alto)/2))  
}

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_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_findObj(n, d) { //v4.0
  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);
  if(!x && document.getElementById) x=document.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 IsDigit()
{
	return (((event.keyCode >= 48) && (event.keyCode <= 57)) ||  (event.keyCode == 37))
}

function IsDigit_coma(obj, valor_ant)
{
	if (obj.value.length == 0){
		//primera pulsacion.  no controlar comas
		return (((event.keyCode >= 48) && (event.keyCode <= 57)) ||  (event.keyCode == 37) ||  (event.keyCode == 46))
	}else{
		var i;
		var longitud = obj.value.length;
		var caracter;
		var devolver = 0;
		for(i=0;i<longitud;i++){
			caracter = obj.value.charAt(i)
			if ((i == 0) && (caracter == '.')){
				//el primer caracter escrito es una coma, incorrecto
				alert('El primer digito no puede ser un punto')
				devolver = 1;
			}
			if ((caracter == ',') && (event.keyCode == 46)){
				alert('Solo puede introducir un punto')
				devolver = 1;
			}
		}
		if (devolver == 0){
			// no hay mas de una coma, correcto
			return (((event.keyCode >= 48) && (event.keyCode <= 57)) ||  (event.keyCode == 37) ||  (event.keyCode == 46))
		}else{
			// error
			obj.value = valor_ant
			return false;
		}
	}
}


function PrimeraComa(obj){
		var i;
		var longitud = obj.value.length;
		var caracter;
		var devolver = 0;
		for(i=0;i<longitud;i++){
			caracter = obj.value.charAt(i)
			if ((i == 0) && (caracter == '.')){
				//el primer caracter escrito es una coma, incorrecto
				alert('El primer digito no puede ser un punto')
				devolver = 1;
			}
			if ((caracter == ',') && (event.keyCode == 46)){
				alert('Solo puede introducir un punto')
				devolver = 1;
			}
		}
		if (devolver == 1){
			// solo se escribio una coma en el contenido
			obj.value = ''
			obj.focus();
		}
}

function AbrirVentanaMantener(theURL,winName,features)
{
   
	neu=window.open(theURL,winName,features);
	neu.focus()
	neu.moveTo(Math.round((screen.availWidth-952)/2),Math.round((screen.availHeight-240)/2))  
}

function AbrirVentana(theURL,winName,features)
{
	var camb = features;
	if (camb.indexOf('top',0) < 0) {
		camb = camb + ',top=216';
	} 
	if (camb.indexOf('left',0) < 0) {
		camb = camb + ',left=159';
	} 
	if (camb.indexOf('width',0) < 0) {
		camb = camb + ',width=500';
	} 
	if (camb.indexOf('height',0) < 0) {
		camb = camb + ',height=350';
	} 
	
	neu=window.open(theURL,winName,camb);
	neu.focus()
	
}

function VentanaCentrada(URL,ancho, alto, titulo)
{
  var width=ancho; height=alto;
  var left = (screen.width/2) - width/2;
  var top = (screen.height/2) - height/2;
  var styleStr = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+',top='+top+',screenX='+left+',screenY='+top;
   var msgWindow = window.open(URL,"Imagen_Ampliada", styleStr);
  msgWindow.focus();
 //	msgWindow.document.title = titulo;
}

function VentanaCentradaScroobars(URL,ancho, alto, titulo)
{
  var width=ancho; height=alto;
  var left = (screen.width/2) - width/2;
  var top = (screen.height/2) - height/2;
  var styleStr = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=1,resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+',top='+top+',screenX='+left+',screenY='+top;
   var msgWindow = window.open(URL,"Imagen_Ampliada", styleStr);
  msgWindow.focus();
 //	msgWindow.document.title = titulo;
}
 function Arroba(sString)
{
	var str = sString.value
	
	if (str != ''){
		// Return false if e-mail field does not contain a '@' and '.' .   
		if (str.indexOf ('@',0) == -1 || str.indexOf ('.',0) == -1)
		{
			alert('Introduzca correctamente el E-mail')
			sString.focus()
			return false;     
		}else{
			return true;      
		}
	}else{
		return true;
	}
}


function Arroba2(sString)
{
	var str = sString.value
	
	if (str != ''){
		// Return false if e-mail field does not contain a '@' and '.' .   
		if (str.indexOf ('@',0) == -1 || str.indexOf ('.',0) == -1)
		{
			return false;     
		}else{
			return true;      
		}
	}else{
		return true;
	}
}

// Si es vacio devuelve FALSE
function compruebavacio(contenido)  {
     if (contenido.length==0) {
	      return false;
	   } else {
		   for (var i=0; i<contenido.length; ++i) {
		   	  if (contenido.charAt(i)!=' ' )
		         {
				   return true;
		         } 
		   }
	   }
	   return false; 
}

function VentanaCentradaScrollbars(URL,ancho, alto, titulo)
{
  var width=ancho; height=alto;
  var left = (screen.width/2) - width/2;
  var top = (screen.height/2) - height/2;
  var styleStr = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=1,resizable=yes,copyhistory=yes,width='+width+',height='+height+',left='+left+',top='+top+',screenX='+left+',screenY='+top;
   var msgWindow = window.open(URL,titulo, styleStr);
  msgWindow.focus();
 //	msgWindow.document.title = titulo;
}

function ltrim(s) {  return s.replace(/^\s+/, "");}
function rtrim(s) {  return s.replace(/\s+$/, "");}
function trim(s) {  return rtrim(ltrim(s));}