function expand(thistag) {
   styleObj = document.getElementById(thistag).style;
   if (styleObj.display=='none') {styleObj.display = '';}
   else {styleObj.display = 'none';}
}


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_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' debe contener una direccion de email valida.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' es requerido para enviar.\n'; }
  } if (errors) alert('Ocurrieron los siguientes errores:\n'+errors);
  document.MM_returnValue = (errors == '');
}


function getLabelForId(id) {
    var label, labels = document.getElementsByTagName('label');
    for (var i = 0; (label = labels[i]); i++) {
        if (label.htmlFor == id) {
            return label;
        }
    }
    return false;
}

function checkEmail() {
    var email = document.getElementById('email');
    var label = getLabelForId('email');
    if (email.value.indexOf('@') == -1 || email == '') { // Naive check for non empty string with @ sign
        label.className = 'problem';
    } else {
        label.className = 'completed';
    }
}

function checkPhone() {
    var phone = document.getElementById('phone');
    var label = getLabelForId('phone');
    var digits = phone.value.replace(/[^0-9]/ig, '');
    if (!digits) {
        label.className = '';
        phone.value = '';
        return;
    }
    if (digits.length == 10) {
        phone.value = '(' + digits.substring(0, 3) + ') ' + 
            digits.substring(3, 6) + '-' + 
            digits.substring(6, 10);
        label.className = 'completed';
    } else {
        label.className = 'problem';
        phone.value = digits;
    }
}

function checkRequired(id) {
    var formfield = document.getElementById(id);
    var label = getLabelForId(id);
    if (formfield.value.length == 0) {
        label.className = 'problem';
    } else {
        label.className = 'completed';
    }
}

addEvent(window, 'load', function() {
    var input;
    var inputs = document.getElementsByTagName('input');
    for (var i = 0; (input = inputs[i]); i++) {
        addEvent(input, 'focus', oninputfocus);
        addEvent(input, 'blur', oninputblur);
    }
    var textareas = document.getElementsByTagName('textarea');
    for (var i = 0; (textarea = textareas[i]); i++) {
        addEvent(textarea, 'focus', oninputfocus);
        addEvent(textarea, 'blur', oninputblur);
    }
});

function oninputfocus(e) {
    /* Cookie-cutter code to find the source of the event */
    if (typeof e == 'undefined') {
        var e = window.event;
    }
    var source;
    if (typeof e.target != 'undefined') {
        source = e.target;
    } else if (typeof e.srcElement != 'undefined') {
        source = e.srcElement;
    } else {
        return;
    }
    /* End cookie-cutter code */
    source.style.border='2px solid #51471C';
}

function oninputblur(e) {
    /* Cookie-cutter code to find the source of the event */
    if (typeof e == 'undefined') {
        var e = window.event;
    }
    var source;
    if (typeof e.target != 'undefined') {
        source = e.target;
    } else if (typeof e.srcElement != 'undefined') {
        source = e.srcElement;
    } else {
        return;
    }
    /* End cookie-cutter code */
    source.style.border='2px solid #ccc';
}

function addEvent(obj, evType, fn){
    if (obj.addEventListener){
        obj.addEventListener(evType, fn, true);
        return true;
    } else if (obj.attachEvent){
        var r = obj.attachEvent("on"+evType, fn);
        return r;
    } else {
        return false;
    }
}