var ID_old;
    Menu_Click(1);
    function Menu_Click(ID)
    {
        if(ID <=0 )
            ID = ID_old;
        else
            ID_old = ID;
        var i;
      
       
        for(i=1; i<=5; i++)
        {
            document.getElementById("Menu"+ i.toString() +"_BG").style.backgroundColor='#EFEFEF';
            //document.getElementById("Menu"+ i.toString() +"_BG").style.borderTop='solid 1px #BCBCBC';
           if(i==ID){
           document.getElementById("SubMenu" + i.toString() ).className = 'Visible';
            document.getElementById("Menu"+ ID +"_BG").style.backgroundColor='#E7F3FF';
            document.getElementById("Menu"+ i.toString() +"_BG").style.borderBottom='solid 1px #E7F3FF';
           }
           else{
            document.getElementById("SubMenu" + i.toString() ).className = 'Hidden';
            document.getElementById("Menu"+ i.toString() +"_BG").style.borderBottom='solid 1px #BCBCBC';
           }
           
        }

    }