// JavaScript Document

var height;
var width=screen.width;

function position_intro() {
	
	
  if( typeof window.innerHeight != 'undefined' ) { // for Mozilla 
    height = window.innerHeight;	
  }
  else if( typeof document.body.clientHeight != 'undefined') { // for IE
    height = document.body.clientHeight;	
  }

  document.getElementById('intro').style.left=(width/2) - 400 +'px';  
  document.getElementById('intro').style.top= (height/2) - 300 +'px';   
  visualizar_intro();  

} 

function visualizar_intro(){
  document.getElementById('intro').style.visibility='visible';
  document.getElementById('intro').style.display='block'; //for NetScape  
}
  
function altura_celda(){
	
  if( typeof window.innerHeight != 'undefined' ) { // for Mozilla 
    height = window.innerHeight;	
  }
  else if( typeof document.body.clientHeight != 'undefined') { // for IE
    height = document.body.clientHeight;	
  }	
  document.getElementById('celda').style.height= height - 375 +'px'; 
	
}