var browserType;
if (document.layers) {browserType = "nn4"}
if (document.all) {browserType = "ie"}
if (window.navigator.userAgent.toLowerCase().match("gecko")) {browserType= "gecko"}
function cambiar_propiedad(id,propiedad,valor) {
  if (existe(id)){
	  if (browserType == "gecko" )
		 document.objeto = eval('document.getElementById(id)');
	  else if (browserType == "ie")
		 document.objeto = eval('document.all[id]');
	  else
		 document.objeto = eval('document.layers[`id]');
	  eval('document.objeto.style.'+propiedad+'="'+valor+'"');
	  //document.objeto.style.display = "none";
  }
}
function mw_get_element_by_id(id) {
	if (browserType == "gecko" )
		document.objeto = eval('document.getElementById(id)');
	else if (browserType == "ie")
		document.objeto = eval('document.all[id]');
	else
		document.objeto = eval('document.layers[`id]');
	return document.objeto;
}
function existe(id) {
	var obj=mw_get_element_by_id(id);
	if (obj==null ) {
		return false;
	}else{ 
		return true;
	}
}
function hide(id) {
	cambiar_propiedad(id,"display","none");
}
function show(id) {
	cambiar_propiedad(id,"display","");
}
function fp_setvalue(id,valor) {
 if (existe(id)){
	  if (browserType == "gecko" )
		 document.poppedLayer = eval('document.getElementById(id)');
	  else if (browserType == "ie")
		 document.poppedLayer = eval('document.all[id]');
	  else
		 document.poppedLayer = eval('document.layers[`id]');
	  document.poppedLayer.value = valor;
  }
}
function fp_modificar_contenido(id,newHTML){
	if (existe(id)){
		var obj=mw_get_element_by_id(id);
		obj.innerHTML = newHTML;
	}
}
function fp_get_valor_input(id) {
  if (existe(id)){
	  if (browserType == "gecko" )
		 document.poppedLayer = eval('document.getElementById(id)');
	  else if (browserType == "ie")
		 document.poppedLayer = eval('document.all[id]');
	  else
		 document.poppedLayer = eval('document.layers[`id]');
	  
	  return (document.poppedLayer.value );
	   
  }
}


function get_valor_select(id) {
	if (existe(id)){
		var obj=mw_get_element_by_id(id);
		var fp_index=obj.selectedIndex;
	 	return (obj.options[fp_index].value );
	}
}

function ckeckbox_check(id) {
	var obj=mw_get_element_by_id(id);
	if (obj==null ) {
		return false;
	}else{ 
		obj.checked=true;
	}
  
}