function hideCol() {
            var col = document.getElementById("txtCol").value;
            if (isNaN(col) || col == "") {
                alert("Invalid Column");
                return;
            }
            col = parseInt(col, 10);
            col = col - 1;
            var tbl = document.getElementById("tblMain");
            if (tbl != null) {
                if (col < 0 || col >= tbl.rows.length - 1) {
                    alert("Invalid Column");
                    return;
                }
                for (var i = 0; i < tbl.rows.length; i++) {
                    for (var j = 0; j < tbl.rows[i].cells.length; j++) {
                        tbl.rows[i].cells[j].style.display = "";
                        if (j == col)
                            tbl.rows[i].cells[j].style.display = "none";
                    }
                }
            }
        }
    


    
        Enter Column Number :
        
        
        (Enter column number in the Textbox and click on Hide Example:1,2,3,..)
        
        
    
    
        
            
                Heading 1
            
            
                Heading 2
            
            
                Heading 3
            
            
                Heading 4
            
        
        
            
                R1C1
            
            
                R1C2
            
            
                R1C3
            
            
                R1C4
            
        
        
            
                R2C1
            
            
                R2C2
            
            
                R2C3
            
            
                R2C4
            
        
        
            
                R3C1
            
            
                R3C2
            
            
                R3C3
            
            
                R3C4
            
        
        
            
                R4C1
            
            
                R4C2
            
            
                R4C3
            
            
                R4C4