function virtual_keyboard(event,target,vk_active) {

if (event.keyCode==96) {
   if (vk_active.checked) {
      vk_active.checked = false;
      event.returnValue = false;
   } else {
     vk_active.checked = true;
     event.returnValue = false;
   }
}


if (!vk_active.checked) return;
if (event.keyCode==97) event.keyCode=4304;              
if (event.keyCode==98) event.keyCode=4305;              
if (event.keyCode==103) event.keyCode=4306;              
if (event.keyCode==100) event.keyCode=4307;               
if (event.keyCode==101) event.keyCode=4308;              
if (event.keyCode==118) event.keyCode=4309;              
if (event.keyCode==122) event.keyCode=4310;             
if (event.keyCode==84) event.keyCode=4311;            
if (event.keyCode==105) event.keyCode=4312;            
if (event.keyCode==107) event.keyCode=4313;            
if (event.keyCode==108) event.keyCode=4314;            
if (event.keyCode==109) event.keyCode=4315;            
if (event.keyCode==110) event.keyCode=4316;            
if (event.keyCode==111) event.keyCode=4317;            
if (event.keyCode==112) event.keyCode=4318;            
if (event.keyCode==74) event.keyCode=4319;            
if (event.keyCode==114) event.keyCode=4320;            
if (event.keyCode==115) event.keyCode=4321;            
if (event.keyCode==116) event.keyCode=4322;            
if (event.keyCode==117) event.keyCode=4323;            
if (event.keyCode==102) event.keyCode=4324;            
if (event.keyCode==113) event.keyCode=4325;            
if (event.keyCode==82) event.keyCode=4326;            
if (event.keyCode==121) event.keyCode=4327;            
if (event.keyCode==83) event.keyCode=4328;            
if (event.keyCode==67) event.keyCode=4329;            
if (event.keyCode==99) event.keyCode=4330;            
if (event.keyCode==90) event.keyCode=4331;            
if (event.keyCode==119) event.keyCode=4332;            
if (event.keyCode==87) event.keyCode=4333;            
if (event.keyCode==120) event.keyCode=4334;            
if (event.keyCode==106) event.keyCode=4335;            
if (event.keyCode==104) event.keyCode=4336;            
}