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 'spec':
			s_change('spec');
			t_change('spec');
		break;
		case 'wat':
			s_change('wat');
			t_change('wat');
		break;
		default: 
			break;
	}

}
	function s_change(tab)
	{
		document.getElementById('tab_spec_data').style.display='none';
		document.getElementById('tab_wat_data').style.display='none';
		document.getElementById('tab_'+tab+'_data').style.display="block";
	}
	function t_change(tab)
	{
		document.getElementById('tab_spec').className="";
		document.getElementById('tab_wat').className="";
	    document.getElementById('tab_'+tab).className="current";
		}