function showInfob(f) 
{ 
 document.getElementById("popasp_table21").style.display="none"; 
 document.getElementById("popasp_table22").style.display="none"; 
 document.getElementById("popasp_table23").style.display="none"; 
 document.getElementById("t21").style.background="#71b3d5"; 
 document.getElementById("t22").style.background="#71b3d5"; 
 document.getElementById("t23").style.background="#71b3d5"; 
 document.getElementById("popasp_table"+f).style.display=""; 
 document.getElementById("t"+f).style.background="#ffffff"; 
}