var browserName=navigator.appName; 
var browserVer=parseInt(navigator.appVersion); 


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 newWindow(mypage,myname,w,h,features) {
  if(screen.width){
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  }else{winl = 0;wint =0;}
  if (winl < 0) winl = 0;
  if (wint < 0) wint = 0;
  var settings = 'height=' + h + ',';
  settings += 'width=' + w + ',';
  settings += 'top=' + wint + ',';
  settings += 'left=' + winl + ',';
  settings += features;
  win = window.open(mypage,myname,settings);
  win.window.focus();
}
function changeColor(color){
  var el=event.srcElement
  if (el.tagName=="INPUT"&&(el.type=="button"||el.type=="submit"||el.type=="reset"))
  event.srcElement.style.backgroundColor=color
}
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_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 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 cambiarImagenObj(poner,obj) {
	  if (poner == 1) {
         obj.className = "activo";
      } else {
        obj.className = "reposo";
      }
}

function disableCombos() {
	if ((browserName=="Microsoft Internet Explorer" && browserVer<=6) && document.getElementsByTagName) {
		var combos = document.getElementsByTagName("select");
		if(combos.length > 0) {
			for(var i = 0; i < combos.length; i++) {
				disableCombo(combos[i]);
			}
		}
	}
}

function enableCombos() {
	if ((browserName=="Microsoft Internet Explorer" && browserVer<=6) && document.getElementsByTagName) {
		var combos = document.getElementsByTagName("select");
		if(combos.length > 0) {
			for(var i = 0; i < combos.length; i++) {
				enableCombo(combos[i]);
			}
		}
	}
}

function disableCombo(obj){
    obj.style.display = "none";
}
function enableCombo(obj){
    obj.style.display = "";
}

function limpia(form){
    form.reset();
}

function validaEmail(Cadena) {
	var Punto = Cadena.substring(Cadena.lastIndexOf('.') + 1, Cadena.length)			// Cadena del .com
	var Dominio = Cadena.substring(Cadena.lastIndexOf('@') + 1, Cadena.lastIndexOf('.')) 	// Dominio @lala.com
	var Usuario = Cadena.substring(0, Cadena.lastIndexOf('@'))					// Cadena lalala@
	var Reserv = "@/?\"\'+*{}\\<>??[]?????#??!^*;,:"						// Letras Reservadas

	var valido = true

	// verifica que el Usuario no tenga un caracter especial
	for (var Cont=0; Cont<Usuario.length; Cont++) {
		X = Usuario.substring(Cont,Cont+1)
		if (Reserv.indexOf(X)!=-1)
	            	valido = false
	}

	// verifica que el Punto no tenga un caracter especial
	for (var Cont=0; Cont<Punto.length; Cont++) {
		X=Punto.substring(Cont,Cont+1)
		if (Reserv.indexOf(X)!=-1)
			valido = false
	}

	// verifica que el Dominio no tenga un caracter especial
	for (var Cont=0; Cont<Dominio.length; Cont++) {
		X=Dominio.substring(Cont,Cont+1)
		if (Reserv.indexOf(X)!=-1)
			valido = false
		}

	// Verifica la sintaxis basica.....
	if (Punto.length<2 || Dominio <1 || Cadena.lastIndexOf('.')<0 || Cadena.lastIndexOf('@')<0 || Usuario<1) {
		valido = false
	}

	return valido;
}