function getAjax(){
  var ajax=false; 
  try { 
   ajax = new ActiveXObject("Msxml2.XMLHTTP"); 
  } catch (e) { 
   try { 
    ajax = new ActiveXObject("Microsoft.XMLHTTP"); 
   } catch (E) { 
    ajax = false; 
   } 
  }
  if (!ajax && typeof XMLHttpRequest!='undefined') { 
   ajax = new XMLHttpRequest(); 
      if (ajax.overrideMimeType) 
			 {
       ajax.overrideMimeType('text/xml');
	   }
  } 
  return ajax;
 }
 
 function getBuy(Pages,objID){
  var objdiary = document.getElementById(objID);
  this.serverPage=Pages;
  var ajaxFri = getAjax();   
  ajaxFri.open("GET", this.serverPage, true); 
  ajaxFri.onreadystatechange = function() { 
   if (ajaxFri.readyState == 4 && ajaxFri.status == 200) { 
    var text = ajaxFri.responseText; 
    if(text!=0){
     objdiary.innerHTML=text;
    }
   } 
  } 
    ajaxFri.send(null); 
 }


function changeTab(cTab) { 

switch(cTab){

		case 'tec':

			s_change('tec');

			t_change('tec');

		break;

			

		case 'mod':

			s_change('mod');

			t_change('mod');

		break;

			

		case 'cod':

			s_change('cod');

			t_change('cod');

		break;

			

		case 'fea':

			s_change('fea');

			t_change('fea');

		break;

			case 'mor':

			s_change('mor');

			t_change('mor');

		break;

		default: 

			break;

	}



}



	function s_change(tab)

	{

		document.getElementById('tab_tec_data').style.display='none';

		document.getElementById('tab_fea_data').style.display='none';

		document.getElementById('tab_cod_data').style.display='none';

		document.getElementById('tab_mod_data').style.display='none';
		
		document.getElementById('tab_mor_data').style.display='none';

		document.getElementById('tab_'+tab+'_data').style.display="block";

	}

	function t_change(tab)

	{

		document.getElementById('tab_tec').className="";

		document.getElementById('tab_mod').className="";

		document.getElementById('tab_cod').className="";

		document.getElementById('tab_fea').className="";
		
		document.getElementById('tab_mor').className="";

	    document.getElementById('tab_'+tab).className="current";

		}