function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

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_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

//funciones para ampliar las imágenes
function ampliarH(foto,carpeta){
	parametros = "toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=600,height=400";
	urlFoto = "img/" + carpeta + "/g/" + foto;
	window.open(urlFoto,"Foto ampliada",parametros);
}
function ampliarV(foto,carpeta){
	parametros = "toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=400,height=600";
	urlFoto = "img/" + carpeta + "/g/" + foto;
	window.open(urlFoto,"Foto ampliada",parametros);
}

function escribirFlash(url,transp,w,h,vars){
	
	document.write('<object classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000 codebase=https://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0 width='+w+' height='+h+'>\r\n');
	document.write('<param name=movie value='+url+' />\r\n');
	document.write('<param name=quality value=high />\r\n');
	document.write('<param name=allowScriptAccess value=sameDomain />\r\n');
	document.write('<param name=menu value=false />\r\n');
	if(transp){
		document.write('<param name=wmode value=transparent />\r\n');
		document.write('<param name=flashVars value='+vars+' />\r\n');
		document.write('<embed src='+url+' width='+w+' height='+h+' quality=high pluginspage=http://www.macromedia.com/go/getflashplayer type=application/x-shockwave-flash wmode=transparent flashVars='+vars+'></embed>\r\n');
	}else{
		document.write('<param name=flashVars value='+vars+' />\r\n');
		document.write('<embed src='+url+' width='+w+' height='+h+' quality=high pluginspage=http://www.macromedia.com/go/getflashplayer type=application/x-shockwave-flash allowscriptaccess=sameDomain menu=false flashVars='+vars+'></embed>\r\n');
	}
	document.write('</object>\r\n');
}

function abrirDoc(url){
	c = "fullscreen=yes,resizable=yes,scrollbars=yes";
	window.open(url,"DOCUMENTO",c);
}
// VALIDACIÓN DE FORMULARIOS
function trim(cadena) {
	for(i=0; i<cadena.length; ) {
		if(cadena.charAt(i)==" ") {
			cadena=cadena.substring(i+1, cadena.length);
		}else{
			break;
		}
	}

	for(i=cadena.length-1; i>=0; i=cadena.length-1)	{
		if(cadena.charAt(i)==" ") {
			cadena=cadena.substring(0,i);
		}else{
			break;
		}
	}
	
	return cadena;
}
function quitarTodosEspacios(cadena) {
	for(i=0; i<cadena.length; i++) {
		if(cadena.charAt(i)==" ") {
			cadena=cadena.substring(i+1, cadena.length);
		}
	}

	for(i=cadena.length-1; i>=0; i--)	{
		if(cadena.charAt(i)==" ") {
			cadena=cadena.substring(0,i);
		}
		
	}
	
	return cadena;
}

function IsAlphaNum( str ) {
	// Return immediately if an invalid value was passed in
	if (str+"" == "undefined" || str+"" == "null" || str+"" == "") {
		return false;
	}
	var isValid = true;
	
	// convert to a string for performing string comparisons.
	str += ""; 
	// Loop through length of string and test for any alpha numeric 
	// characters
	for (i = 0; i < str.length; i++) {
		// Alphanumeric must be between "0"-"9", "A"-"Z", or "a"-"z"
		if (!(((str.charAt(i) >= "0") && (str.charAt(i) <= "9")) || 
		((str.charAt(i) >= "a") && (str.charAt(i) <= "z")) ||
		((str.charAt(i) >= "A") && (str.charAt(i) <= "Z"))))
		{
			isValid = false;
			break;
		} 
	} // END for 
	return isValid;
} // end IsAlphaNum

function IsNum( str ) {
	// Return immediately if an invalid value was passed in
	if (str+"" == "undefined" || str+"" == "null" || str+"" == "") {
		return false;
	}
	var isValidNum = true;
	
	// convert to a string for performing string comparisons.
	str += ""; 
	// Loop through length of string and test for any alpha numeric 
	// characters
	for (i = 0; i < str.length; i++) {
		// Numeric must be between "0"-"9"
		if (!( (str.charAt(i) >= "0") && (str.charAt(i) <= "9") ) ) {
			isValidNum = false;
			break;
		} 
	} // END for 
	return isValidNum;
} // end IsNum

function validarEmail(valor) {
  if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(valor)){
   return (true)
  } else {
   return (false);
  }
}
function popUp(){
	ancho = 300;
	alto = 250;
	variables = "width=" + ancho + ",height=" + alto + ",left=" + ((screen.width-ancho)/2) + ",top=" + ((screen.height-alto)/2);
	window.open("avisoTutoria.php","popup",variables);
}