function cambiarmail(){
	obj=document.getElementById('topemail');
	if(obj.value=='' || obj.value=='E-mail'){
		obj.className='inputs';
		obj.value='';
	}
}

function cambiarmailed(){
	obj=document.getElementById('topemail');
	if(obj.value=='' || obj.value=='E-mail'){
		obj.value='E-mail';
		obj.className='inputs';
	}
}


function changeInputType(
  oldElm, // a reference to the input element
  iType, // value of the type property: 'text' or 'password'
  iValue, // the default value, set to 'password' in the demo
  blankValue, // true if the value should be empty, false otherwise
  noFocus
  ) {  // set to true if the element should not be given focus
 
  if(!oldElm || !oldElm.parentNode || (iType.length<4) || !document.getElementById || !document.createElement) return;
  var newElm = document.createElement('input');
  newElm.type = iType;
  if(oldElm.name) newElm.name = oldElm.name;
  if(oldElm.id) newElm.id = oldElm.id;
  //if(oldElm.className) newElm.className = oldElm.className;
  if(oldElm.className=='entrada-off'){newElm.className='inputs';} else {newElm.className='inputs';};
  if(oldElm.size) newElm.size = oldElm.size;
  if(oldElm.tabIndex) newElm.tabIndex = oldElm.tabIndex;
  if(oldElm.accessKey) newElm.accessKey = oldElm.accessKey;
  newElm.onfocus = function(){return function(){
    if(this.hasFocus) return;
     var newElm = changeInputType(this,'password',iValue, (this.value.toLowerCase()==iValue.toLowerCase())?true:false);
	if(newElm) newElm.hasFocus=true;
  }}();
  newElm.onblur = function(){return function(){
    if(this.hasFocus)
    if(this.value=='' || (this.value.toLowerCase()==iValue.toLowerCase())) {
	  changeInputType(this,'text',iValue,false,true);
    }
  }}();
 // hasFocus is to prevent a loop where onfocus is triggered over and over again
  newElm.hasFocus=false;
  oldElm.parentNode.replaceChild(newElm,oldElm);
  if(!blankValue) newElm.value = iValue;
  if(!noFocus || typeof(noFocus)=='undefined') {
    window.tempElm = newElm;
    setTimeout("tempElm.hasFocus=true;tempElm.focus();",1);
  }
  return newElm;
}

/* OBLIGAR A INTRODUCIR VALORES NÚMERICOS Y ACEPATA COMA PARA DECIMALES */
function IsNumberDecimal(e) {
	tecla = (document.all) ? e.keyCode : e.which;
	if (tecla==8) return true; //TECLA DE BORRAR (RETROCESO)
	if (tecla==0) return true; //TECLAS ESPECIALES COMO CURSORES, SUPRIMIR, TABULADOR ...
	if (tecla==44) return true; //COMA
		patron = /\d/; // Solo acepta números
		te = String.fromCharCode(tecla);
	return patron.test(te);
}