var bw=new lib_bwcheck()

//----------------------------------------------------


function change_display(capa)
{
 if(capa.style.display == "")
 {
    capa.style.display = "none";
 }
 else
 {
    capa.style.display = "";
 }
}

function isEmail(string) {
  if(string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1) {
   return true;
  } else {
   return false;
  }
}

function abrirImagen(nombre,ancho,alto) {
	dat = 'width=' + ancho + ',height=' + alto + ',left=100,top=100,scrollbars=no,resize=no';
	window.open(nombre,'',dat);
}

// Esta función permitirá validar la fecha
// En el objeto text hacemos lo Siguiente
/*
   <input type=\'text\' name=cajaFecha onChange=\'fechas(this.value); this.value=borrar\'>
*/
function fechas(caja)
{ 
   if (caja)
   {  
      borrar = caja;
      if ((caja.substr(2,1) == "/") && (caja.substr(5,1) == "/"))
      {      
         for (i=0; i<10; i++)
	     {	
            if (((caja.substr(i,1)<"0") || (caja.substr(i,1)>"9")) && (i != 2) && (i != 5))
			{
               borrar = '';
               break;  
			}  
         }
	     if (borrar)
	     { 
	        a = caja.substr(6,4);
		    m = caja.substr(3,2);
		    d = caja.substr(0,2);
		    if((a < 1900) || (a > 2050) || (m < 1) || (m > 12) || (d < 1) || (d > 31))
		       borrar = '';
		    else
		    {
		       if((a%4 != 0) && (m == 2) && (d > 28))	   
		          borrar = ''; // Año no viciesto y es febrero y el dia es mayor a 28
			   else	
			   {
		          if ((((m == 4) || (m == 6) || (m == 9) || (m==11)) && (d>30)) || ((m==2) && (d>29)))
			         borrar = '';	      				  	 
			   }  // else
		    } // else
         } // if (error)
      } // if ((caja.substr(2,1) == "/") && (caja.substr(5,1) == "/"))			    			
	  else
	     borrar = '';
	  if (borrar == '')
	     alert('Fecha erronea');
   } // if (caja)   
} // FUNCION


function isEntero(valor){
      //intento convertir a entero.
     //si era un entero no le afecta, si no lo era lo intenta convertir
	 
	//valor = parseInt(valor)
		valor=valor.replace(".","");
		valor=valor.replace(".","");
		valor=valor.replace(".","");
		
      //Compruebo si es un valor numérico
      if (isNaN(valor)) {
            //entonces (no es numero) devuelvo el valor cadena vacia
            return false;
      }else{
            //En caso contrario (Si era un número) devuelvo el valor
            return true;
      }
}


function isTelefono(valor){
      //intento convertir a entero.
     //si era un entero no le afecta, si no lo era lo intenta convertir
	 
	//valor = parseInt(valor)

      //Compruebo si es un valor numérico
      if (isNaN(valor)) {
            //entonces (no es numero) devuelvo el valor cadena vacia
            return false;
      }else{
            //En caso contrario (Si era un número) devuelvo el valor
			if (valor<600000000 || valor>999999999){
				return false;
			}else{
				return true;
			}
      }
}


function quitarCeros(valor){
		valor=valor.replace(".","");
		valor=valor.replace(".","");
		valor=valor.replace(".","");
		
		return valor;
}

function formatNmb(nNmb){
	    var sRes = "";
		nNmb=nNmb.replace(".","");
		nNmb=nNmb.replace(".","");
		nNmb=nNmb.replace(".","");
	    for (var j, i = nNmb.length - 1, j = 0; i >= 0; i--, j++)
	     sRes = nNmb.charAt(i) + ((j > 0) && (j % 3 == 0)? ".": "") + sRes;
	    return sRes;
   } 

function lib_bwcheck(){ //Browsercheck (needed)
	this.ver=navigator.appVersion
	this.agent=navigator.userAgent
	this.dom=document.getElementById?1:0
	this.opera5=this.agent.indexOf("Opera 5")>-1
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0; 
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
	this.ie7=(this.ver.indexOf("MSIE 7")>-1 && this.dom && !this.opera5)?1:0;
	this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
	this.ie=this.ie4||this.ie5||this.ie6
	this.mac=this.agent.indexOf("Mac")>-1
	this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
	this.ns4=(document.layers && !this.dom)?1:0;
	this.bw=(this.ie7 || this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5)
	return this
}




/***************************************************************************
Use the style tag to change the placement and width of the layers.
If you are trying to place this into a table cell or something make the
position of the divNewsCont layer relative...Remeber that that might crash
Netscape 4 though, Good luck!
********************************************************************************/

/****
Variables to set 
****/

//How do you want the script to work? 
//0 = Fade in - Fade out
//1 = Slide in - Fade out
//2 = Random 
nWorks = 1

//If you use the slide set these variables:
nSlidespeed = 0 //in px
nNewsheight = 0 //This is how long down it should start the slide.

nBetweendelay = 1000 //The delay before fading out.
nFont = 'arial,helvetiva' //The font for the news.
nFontsize = 11 //Font size in pixel.
nFadespeed = 400 //The speed to fade in, in milliseconds.

//Set the colors, first color is same as background, last color is the color it stops at:
//You can have as many colors you want
nColor=new Array('#FFFFFF', '#EEEEEE','#CCCCCC','#999999','#999999','#666666','#828484')

//This is the news you wanna have, set the link and the text. If you don't wan't it to link anywhere


/*
LOS ARRAYS SE RELLENAN EN TMPL_PRINCIPAL
//use a # as the link
nNews=new Array()
//Copy there three lines and change the info and numbers to get more news.
nNews[0]=new Array()
nNews[0]["text"]="Fuertes caídas del Ibex..."
nNews[0]["link"]="secc_clientes/"

nNews[1]=new Array()
nNews[1]["text"]="Telefónica adjudica 28,5 millones de euros..."
nNews[1]["link"]="secc_clientes/"

nNews[2]=new Array()
nNews[2]["text"]="Google invierte el 22% de su capital en infraestructuras para el desarrollo..."
nNews[2]["link"]="secc_clientes/"

**/
/********************************************************************************
Object code...Object constructors and functions...
********************************************************************************/
function makeNewsObj(obj,nest,font,size,color,news,fadespeed,betweendelay,slidespeed,works,newsheight){
	//alert('makenew');
    nest=(!nest) ? "":'document.'+nest+'.'
   	this.css=bw.dom? document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+"document.layers." +obj):0;	
   	this.writeref=bw.dom? document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+"document.layers." +obj+".document"):0;
	if(font){this.color=new Array(); this.color=eval(color); this.news=new Array(); this.news=eval(news)
		this.font=font; this.size=size; this.speed=fadespeed; this.delay=betweendelay; this.newsheight=newsheight;
		this.fadeIn=b_fadeIn;this.fadeOut=b_fadeOut; this.newsWrite=b_newsWrite; this.y=1
		this.slideIn=b_slideIn; this.moveIt=b_moveIt; this.slideSpeed=slidespeed; this.works=works
		if(bw.dom || bw.ie4){this.css.fontFamily=this.font; this.css.fontSize=this.size; this.css.color=this.color[0]}
	}
	this.obj = obj + "Object"; 	eval(this.obj + "=this"); return this
}

// A unit of measure that will be added when setting the position of a layer.
var px = bw.ns4||window.opera?"":"px";

function b_moveIt(x,y){this.x=x; this.y=y; this.css.left=this.x+px; this.css.top=this.y+px;}

function b_newsWrite(num,i){
	if (bw.ns4){ /*target=\"myTarget\"target="myTarget"*/
		this.writeref.write("<a href=\"http://www.google.es\"  style=\"text-decoration:none; font-size:"+this.size+"px\">"
			+"<font face=\""+this.font+"\" color=\""+this.color[i]+"\">eeeerererererer"+this.news[num]['text']+"</font></a>")
		this.writeref.close()
	}else this.writeref.innerHTML = '<a id="'+this.obj+'link' +'"   style="text-decoration:none; font-size:'+this.size+'px; color:'+this.color[i]+'" href="'+this.news[num]['link']+'">'+this.news[num]['text']+'</a>'
}
//Slide in
function b_slideIn(num,i){
	if (this.y>0){
		if (i==0){this.moveIt(0,this.newsheight); this.newsWrite(num,this.color.length-1)}
		this.moveIt(this.x,this.y-this.slideSpeed)
		i ++
		setTimeout(this.obj+".slideIn("+num+","+i+");",50)
	}else setTimeout(this.obj+".fadeOut("+num+","+(this.color.length-1)+")",this.delay)
}
//The fade functions
function b_fadeIn(num,i){
	if (i<this.color.length){
		if (i==0 || bw.ns4) this.newsWrite(num,i)
		else{
			obj = bw.ie4?eval(this.obj+"link"):document.getElementById(this.obj+"link")
			obj.style.color = this.color[i]
		}
		i ++
		setTimeout(this.obj+".fadeIn("+num+","+i+")",this.speed)
	}else setTimeout(this.obj+".fadeOut("+num+","+(this.color.length-1)+")",this.delay)
}

function b_fadeOut(num,i){
	if (i>=0){
		if (i==0 || bw.ns4) this.newsWrite(num,i)	
		else{
			obj = bw.ie4?eval(this.obj+"link"):document.getElementById(this.obj+"link")
			obj.style.color = this.color[i]
		}
		i --
		setTimeout(this.obj+".fadeOut("+num+","+i+")",this.speed)
	}else{
		num ++
		if(num==this.news.length) num=0
		works = !this.works?0:this.works==1?1:Math.round(Math.random())
		if(works==0) setTimeout(this.obj+".fadeIn("+num+",0)",500)
		else if (works==1){this.y=1; setTimeout(this.obj+".slideIn("+num+",0)",500)
		}
	}
}
/********************************************************************************************
The init function. Calls the object constructor and set some properties and starts the fade
*********************************************************************************************/
function fadeInit(){
	
	oNews = new makeNewsObj('divNews','divNewsCont',nFont,nFontsize,"nColor","nNews",nFadespeed,nBetweendelay,nSlidespeed,nWorks,nNewsheight)
	
	oNewsCont = new makeNewsObj('divNewsCont')
	works = !oNews.works?0:oNews.works==1?1:Math.round(Math.random())
	if (works==0) oNews.fadeIn(0,0)
	else if (works==1) oNews.slideIn(0,0)
	oNewsCont.css.visibility = "visible"
}

//----------------------------------------------------




//----------------------------------------------------
//Dar estilo a los alerts

// constants to define the title of the alert and button text.
var ALERT_TITLE = "¡AVISO!";
var ALERT_BUTTON_TEXT = "Aceptar";

// over-ride the alert method only if this a newer browser.
// Older browser will see standard alerts
if(document.getElementById) {
	window.alert = function(txt) {
		createCustomAlert(txt);
	}
}

function createCustomAlert(txt) {
	// shortcut reference to the document object
	d = document;

	// if the modalContainer object already exists in the DOM, bail out.
	if(d.getElementById("modalContainer")) return;

	// create the modalContainer div as a child of the BODY element
	mObj = d.getElementsByTagName("body")[0].appendChild(d.createElement("div"));
	mObj.id = "modalContainer";
	 // make sure its as tall as it needs to be to overlay all the content on the page
	mObj.style.height = 500 + "px";

	// create the DIV that will be the alert 
	alertObj = mObj.appendChild(d.createElement("div"));
	alertObj.id = "alertBox";
	// MSIE doesnt treat position:fixed correctly, so this compensates for positioning the alert
	if(d.all && !window.opera) alertObj.style.top = document.documentElement.scrollTop + "px";
	// center the alert box
	alertObj.style.left = (d.documentElement.scrollWidth - alertObj.offsetWidth)/2 + "px";

	// create an H1 element as the title bar
	h1 = alertObj.appendChild(d.createElement("h1"));
	h1.appendChild(d.createTextNode(ALERT_TITLE));

	// create a paragraph element to contain the txt argument
	msg = alertObj.appendChild(d.createElement("p"));
	msg.appendChild(d.createTextNode(txt));

	// create an anchor element to use as the confirmation button.
	btn = alertObj.appendChild(d.createElement("a"));
	btn.id = "closeBtn";
	btn.appendChild(d.createTextNode(ALERT_BUTTON_TEXT));
	btn.href = "#";
	// set up the onclick event to remove the alert when the anchor is clicked
	btn.onclick = function() { removeCustomAlert();return false; }

	
}

// removes the custom alert from the DOM
function removeCustomAlert() {
	document.getElementsByTagName("body")[0].removeChild(document.getElementById("modalContainer"));
}
<!-- ALERTA -->



//----------------------------------------------------


//----------------------------------------