function swch(n) {
  if (n=='1') {
	document.getElementById('step1').style.display = 'block';
	document.getElementById('step2').style.display = 'none';
	document.getElementById('step3').style.display = 'none';
	document.getElementById('step1_swch').className = 'active';
	document.getElementById('step2_swch').className = 'none';
	document.getElementById('step3_swch').className = 'none';
  } else if (n=='2') {
	document.getElementById('step1').style.display = 'none';
	document.getElementById('step2').style.display = 'block';
	document.getElementById('step3').style.display = 'none';
	document.getElementById('step1_swch').className = 'none';
	document.getElementById('step2_swch').className = 'active';
	document.getElementById('step3_swch').className = 'none';
  } else if (n=='3') {
	document.getElementById('step1').style.display = 'none';
	document.getElementById('step2').style.display = 'none';
	document.getElementById('step3').style.display = 'block';
	document.getElementById('step1_swch').className = 'none';
	document.getElementById('step2_swch').className = 'none';
	document.getElementById('step3_swch').className = 'active';
  } else {
	document.getElementById('step1').style.display = 'block';
	document.getElementById('step2').style.display = 'none';
	document.getElementById('step3').style.display = 'none';
	document.getElementById('step1_swch').className = 'active';
	document.getElementById('step2_swch').className = 'none';
	document.getElementById('step3_swch').className = 'none';	  
	}
  
  return false;
}