$("#go").click(function(){
      $("#block").animate({ 
        width: "70%",
        opacity: 0.4,
        marginLeft: "0.6in",
        fontSize: "3em", 
        borderWidth: "10px"
      }, 1500 );
    });


function MoveBack(){
    var maxMove =  0;
    var move = 0;
    
    if((parseInt(document.getElementById("defil").style.marginLeft)+200) > 0)
        move = 0;
    else
        move = parseInt(document.getElementById("defil").style.marginLeft)+200;

    $("#defil").animate({marginLeft: move+"px"},"normal","swing");
}

function MoveNext(){
    var maxMove =  860-lgMenu;
    var move = 0;
    
    if((parseInt(document.getElementById("defil").style.marginLeft)-200) < maxMove)
        move = maxMove;
    else
        move = parseInt(document.getElementById("defil").style.marginLeft)-200;

    $("#defil").animate({marginLeft: move+"px"},"normal","swing");
}