function WebGrid1_OnRowContextMenu(controlId, rowType, rowElement, menuObject)
{
    var menuItem1 = new WebMenuItem();
    menuItem1.Text = "Menu1";   
    menuItem1.Name = "MyMenu1";
    menuItem1.OnClick = "OnClick";

    var menuItem2 = new WebMenuItem();              
    menuItem2.Text = "Menu2";               
    menuItem2.Name = "MyMenu2";             
    menuItem2.OnClick = "OnClick";                  
    
    var menuItem3 = new WebMenuItem();              
    menuItem3.Text = "Menu3";               
    menuItem3.Name = "MyMenu3"; 
    menuItem3.OnClick = "OnClick"; 
 
    var separator = new WebMenuItem();  
    separator.Type = "Separator"                 
    separator.Name = "MySeparator"              

    var subItem1 = new WebMenuItem();           
    subItem1.Text = "Sub 1";            
    subItem1.Text = "MySub1";           
    subItem1.OnClick = "OnClick";       

    var subItem2 = new WebMenuItem();            
    subItem2.Text = "Sub 2";                
    subItem2.Text = "MySub2";             
    subItem1.OnClick = "OnClick";       

    menuItem1.Items.Add(subItem1);
    menuItem1.Items.Add(subItem2);

    menuObject.Items.Add(menuItem1);               
    menuObject.Items.Add(menuItem2);              
    menuObject.Items.Add(separator);              
    menuObject.Items.Add(menuItem3);     

    return true;        
}

function OnClick(menuItem)
{
    // execute function for selected menuItem               
    alert("Menu.Name : " + menuItem.Name + "\n" + "Menu.Text = " + menuItem.Text);
    return true;   
}