function createTable()  
    {  
    rn = window.prompt("Input number of rows", 1);  
    cn = window.prompt("Input number of columns",1);  
        
     for(var r=0;r<parseInt(rn,10);r++)  
      {  
       var x=document.getElementById('myTable').insertRow(r);  
       for(var c=0;c<parseInt(cn,10);c++)    
        {  
         var y=  x.insertCell(c);  
         y.innerHTML="Row-"+r+" Column-"+c;   
        }  
       }  
    }