function getDataServer(url, vars){
     var xml = null;
     try{
         xml = new ActiveXObject("Microsoft.XMLHTTP");
     }catch(expeption){
         xml = new XMLHttpRequest();
     }
     xml.open("GET",url + vars, false);
     xml.send(null);
     if(xml.status == 404) alert("Url no valida");
     return xml.responseText;
}


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) { //v4.01
  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 enviar_letra(url){
	window.open(url+'subir_letra.php','_blank','width=350,height=440,scrollbars=no,statusbar=no');	


}
function verificar_comentario(form){
	em_val = /^[^@\s]+@[^@\.\s]+(\.[^@\.\s]+)+$/;http = /http/g;java = /script/i;http1 = /HTTP/g;www = /www/g;www1 = /WWW/g;
	if(www.test(form.comenta.value)){alert("No se permite Direcciones url,codigo fuente.!)");return false;}
	if(www1.test(form.comenta.value)){alert("No se permite Direcciones url,codigo fuente.!)");return false;}
	if(http.test(form.comenta.value)){alert("No se permite Direcciones url,codigo fuente.!)");return false;}
	if(http1.test(form.comenta.value)){alert("No se permite Direcciones url,codigo fuente.!)");return false;}
	if(java.test(form.comenta.value)){alert("No se permite Direcciones url,codigo fuente.!)");return false;}
	if(form.nombre.value == ''){alert("Escriba su nombre!");return false;}
	if(form.email.value == ''){alert("Escriba su E-mail!");return false;}
	if(!em_val.test(form.email.value)){alert("Verifique su E-Mail");return false;}
	if(form.comenta.value == ''){alert("Escriba su comentario!");return false;}
	if(form.codigo_img.value == ''){alert("Escriba su codigo seguridad!");return false;}
	return true;	

}
function Vbuscar(){
	if(document.frmBusca.buscar.value != ''){
		document.frmBusca.submit();
	}else{
		alert("Escriba Algun caracter para Buscar");
		return false;
	}
}
function accion_busca(){
	if(document.frm_busca.busca.value != ''){
		document.frm_busca.submit();
	}else{
		alert("Escriba Algun caracter para Buscar");return false;
	}
}