dialog button close

HTML

<div id="body"></div>

JavaScript

$("#body").append($("<div class='openDialog' id='newdialog'><div id='dialogbody'></div></div>"));
$('#newdialog').dialog({
    autoOpen: false,
    dialogClass: "no-close",
    modal: true,
    width: 400,
    height: 375,
    resizable: false,
    closeOnEscape: false
});