function limpia(elemento,texto){if(elemento.value==texto)elemento.value=""}

function verifica(elemento,texto){if(elemento.value=="")elemento.value=texto}

function mostrar(elemento){document.getElementById(elemento).style.display='block'}

function ocultar(elemento){document.getElementById(elemento).style.display='none'}

function classi(elemento,classnombre){document.getElementById(elemento).className=classnombre}

function classi_reset(elemento,classnombre){for(var x=1;x<11;x++){if(document.getElementById(elemento+x))document.getElementById(elemento+x).className=classnombre}}


function creaAjax(){var xmlhttp=false;try{ xmlhttp=new ActiveXObject("Msxml2.XMLHTTP")}catch(e){try{xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")}catch(E){xmlhttp=false}}if(!xmlhttp && typeof XMLHttpRequest!='undefined'){xmlhttp=new XMLHttpRequest()}return xmlhttp}function ajax(url,id_contenedor,varsform){var pagina_requerida=creaAjax();if(varsform!=null)
pagina_requerida.open('POST', url, true);
else
pagina_requerida.open('GET', url, true);
pagina_requerida.onreadystatechange=function(){
cargarpagina(pagina_requerida,id_contenedor,varsform)}
if(varsform!=null){var myarr=varsform.split(':');var trama="";var i=0;
for(i=0;i<(myarr.length);i++){if(i>0)trama+="&";if(document.getElementById(myarr[i])!=null)trama+=myarr[i]+"="+document.getElementById(myarr[i]).value}
pagina_requerida.setRequestHeader('Content-Type','application/x-www-form-urlencoded');pagina_requerida.setRequestHeader("Cache-Control", "no-store, no-cache, must-revalidate");pagina_requerida.setRequestHeader("Cache-Control", "post-check=0, pre-check=0");pagina_requerida.setRequestHeader("Pragma", "no-cache");pagina_requerida.setRequestHeader("Content-length",trama.length);pagina_requerida.setRequestHeader("Connection","close");pagina_requerida.send(trama)}else pagina_requerida.send(null)}function cargarpagina(pagina_requerida,id_contenedor,varsform){if(pagina_requerida.readyState==1 || pagina_requerida.readyState==2 || pagina_requerida.readyState==3)if(document.getElementById(id_contenedor)!=null)document.getElementById(id_contenedor).innerHTML="<center><img src='http://imagenes.webminijuegos.com/images/ajax-loader.gif' width='100' height='100' alt='' border='0' /></center>";if(pagina_requerida.readyState==4){var ajaxDisplay=document.getElementById(id_contenedor);var redireccion='/';var array=pagina_requerida.responseText.split(',');if(array[0]=='login succes'){if(array[1]!=null)redireccion=array[1];window.location=redireccion;}if(document.getElementById(id_contenedor)!=null)document.getElementById(id_contenedor).innerHTML=pagina_requerida.responseText}}