function goto(mmain) {
    //alert(mmain);
   if (mmain==01) { window.open("index.php","_self"); }
   if (mmain==02) { window.open("differ.php","_self"); }
   if (mmain==03) { window.open("work.php","_self"); }
   if (mmain==04) { window.open("expertise.php","_self"); }
   if (mmain==05) { window.open("showcase.php","_self"); }
   if (mmain==06) { window.open("build.php","_self"); }
   if (mmain==9898) { window.open("activity.html","_self"); }
}