function divChg1(nu,gr) {

  if (nu==1){
  document.getElementById(gr+'1').background="images/td1.jpg";
  document.getElementById(gr+'2').background="images/td2.jpg";
  document.getElementById(gr+'3').background="images/td2.jpg";
  document.getElementById(gr+'4').background="images/td2.jpg";
  document.getElementById(gr+'5').background="images/td2.jpg";
  document.getElementById(gr+'6').background="images/td2.jpg";
    document.getElementById(gr+'7').background="images/td2.jpg";
  
 
  document.getElementById(gr+'t1').style.display='';
  document.getElementById(gr+'t2').style.display='none';
  document.getElementById(gr+'t3').style.display='none';
  document.getElementById(gr+'t4').style.display='none';
  document.getElementById(gr+'t5').style.display='none';
  document.getElementById(gr+'t6').style.display='none';
  document.getElementById(gr+'t7').style.display='none';
   

  }else if(nu==2){
  document.getElementById(gr+'1').background="images/td2.jpg";
  document.getElementById(gr+'2').background="images/td1.jpg";
  document.getElementById(gr+'3').background="images/td2.jpg";
  document.getElementById(gr+'4').background="images/td2.jpg";
  document.getElementById(gr+'5').background="images/td2.jpg";
  document.getElementById(gr+'6').background="images/td2.jpg";
  document.getElementById(gr+'7').background="images/td2.jpg";
 
 
  document.getElementById(gr+'t1').style.display='none';
  document.getElementById(gr+'t2').style.display='';
  document.getElementById(gr+'t3').style.display='none';
  document.getElementById(gr+'t4').style.display='none';
  document.getElementById(gr+'t5').style.display='none';
  document.getElementById(gr+'t6').style.display='none';
  document.getElementById(gr+'t7').style.display='none';
     
  }else if(nu==3){
  document.getElementById(gr+'1').background="images/td2.jpg";
  document.getElementById(gr+'2').background="images/td2.jpg";
  document.getElementById(gr+'3').background="images/td1.jpg";
  document.getElementById(gr+'4').background="images/td2.jpg";
  document.getElementById(gr+'5').background="images/td2.jpg";
  document.getElementById(gr+'6').background="images/td2.jpg";
  document.getElementById(gr+'7').background="images/td2.jpg";
 
   
  
  document.getElementById(gr+'t1').style.display='none';
  document.getElementById(gr+'t2').style.display='none';
  document.getElementById(gr+'t3').style.display=''; 
  document.getElementById(gr+'t4').style.display='none';
  document.getElementById(gr+'t5').style.display='none';
  document.getElementById(gr+'t6').style.display='none';
  document.getElementById(gr+'t7').style.display='none';
      
  }else if(nu==4){
  document.getElementById(gr+'1').background="images/td2.jpg";
  document.getElementById(gr+'2').background="images/td2.jpg";
  document.getElementById(gr+'3').background="images/td2.jpg";
  document.getElementById(gr+'4').background="images/td1.jpg";
  document.getElementById(gr+'5').background="images/td2.jpg";
  document.getElementById(gr+'6').background="images/td2.jpg";
  document.getElementById(gr+'7').background="images/td2.jpg";
 
   
  
  document.getElementById(gr+'t1').style.display='none';
  document.getElementById(gr+'t2').style.display='none';
  document.getElementById(gr+'t3').style.display='none'; 
  document.getElementById(gr+'t4').style.display='';
  document.getElementById(gr+'t5').style.display='none';
  document.getElementById(gr+'t6').style.display='none';
  document.getElementById(gr+'t7').style.display='none';
    }else if(nu==5){
  document.getElementById(gr+'1').background="images/td2.jpg";
  document.getElementById(gr+'2').background="images/td2.jpg";
  document.getElementById(gr+'3').background="images/td2.jpg";
  document.getElementById(gr+'4').background="images/td2.jpg";
  document.getElementById(gr+'5').background="images/td1.jpg";
  document.getElementById(gr+'6').background="images/td2.jpg";
  document.getElementById(gr+'7').background="images/td2.jpg";
 
   
  
  document.getElementById(gr+'t1').style.display='none';
  document.getElementById(gr+'t2').style.display='none';
  document.getElementById(gr+'t3').style.display='none'; 
  document.getElementById(gr+'t4').style.display='none';
  document.getElementById(gr+'t5').style.display='';
  document.getElementById(gr+'t6').style.display='none';
  document.getElementById(gr+'t7').style.display='none';
    }
	else if(nu==6){
  document.getElementById(gr+'1').background="images/td2.jpg";
  document.getElementById(gr+'2').background="images/td2.jpg";
  document.getElementById(gr+'3').background="images/td2.jpg";
  document.getElementById(gr+'4').background="images/td2.jpg";
  document.getElementById(gr+'5').background="images/td2.jpg";
  document.getElementById(gr+'6').background="images/td1.jpg";
  document.getElementById(gr+'7').background="images/td2.jpg";
 
   
  
  document.getElementById(gr+'t1').style.display='none';
  document.getElementById(gr+'t2').style.display='none';
  document.getElementById(gr+'t3').style.display='none'; 
  document.getElementById(gr+'t4').style.display='none';
  document.getElementById(gr+'t5').style.display='none';
  document.getElementById(gr+'t6').style.display='';
  document.getElementById(gr+'t7').style.display='none';
  
}
	else if(nu==7){
  document.getElementById(gr+'1').background="images/td2.jpg";
  document.getElementById(gr+'2').background="images/td2.jpg";
  document.getElementById(gr+'3').background="images/td2.jpg";
  document.getElementById(gr+'4').background="images/td2.jpg";
  document.getElementById(gr+'5').background="images/td2.jpg";
  document.getElementById(gr+'6').background="images/td2.jpg";
  document.getElementById(gr+'7').background="images/td1.jpg";
 
   
  
  document.getElementById(gr+'t1').style.display='none';
  document.getElementById(gr+'t2').style.display='none';
  document.getElementById(gr+'t3').style.display='none'; 
  document.getElementById(gr+'t4').style.display='none';
  document.getElementById(gr+'t5').style.display='none';
  document.getElementById(gr+'t6').style.display='none';
  document.getElementById(gr+'t7').style.display='';
  
}

}