function mostrar(id){
	document.getElementById('summary').className='item_resume_no';
	document.getElementById('m_summary').className='';
	document.getElementById('knowledge').className='item_resume_no';
	document.getElementById('m_knowledge').className='';
	document.getElementById('experience').className='item_resume_no';
	document.getElementById('m_experience').className='';
	document.getElementById('studies').className='item_resume_no';
	document.getElementById('m_studies').className='';
	document.getElementById('skills').className='item_resume_no';
	document.getElementById('m_skills').className='';
	
	document.getElementById(id).className='item_resume';
	document.getElementById('m_'+id).className='selected';
}