function pagenumback(i,datalist_id)
		{		    
		   
		   if(i=="left")
		   {
		      
		     document.getElementById(datalist_id+":current_direction").value=parseInt(document.getElementById(datalist_id+":current_direction").value)-1;		      
		     document.getElementById(datalist_id+":num_page").value=parseInt(document.getElementById(datalist_id+":current_direction").value)*10;		      
		     Form1.submit();
		     return true;
		   }
		    
		   if(i=="right")
		   {
		     document.getElementById(datalist_id+":num_page").value=parseInt(parseInt(document.getElementById(datalist_id+":current_direction").value)*10)+1;
		     document.getElementById(datalist_id+":current_direction").value=parseInt(document.getElementById(datalist_id+":current_direction").value)+1;     		      
		     //alert(document.getElementById(datalist_id+":num_page").value)
		     //alert(document.getElementById(datalist_id+":current_direction").value)
		     Form1.submit();
		     return true;
		   }
		   
		   document.getElementById(datalist_id+":num_page").value=i;		   		   		   
		   Form1.submit();
		    
		}