var tab_label=1;
function tab_line(obj){
var label = obj.id.split("_")[1];
if (tab_label==label){
   obj.blur();
   return;
}
document.getElementById("tab_"+tab_label).className="";
document.getElementById("tab_"+label).className="tab-on";
document.getElementById("con_"+tab_label).style.display="none";
document.getElementById("con_"+label).style.display="";
tab_label=label;
obj.blur();
}