type : set 'date' in type option

    [Javascript Source]
    wdtGrid.dateChar = '-'; // '-', '/', '.', '' (기본 : '-')
    var column =  [
        { id: "text1", name: "text1", type: "text"  , readonly:false, width: "100", align: 'left' },
        { id: "text2", name: "text2", type: "text"  , readonly:false, width: "100", align: 'left' },
        { id: "date1", name: "date1", type: "date"  , readonly:false, width: "100", align: 'center' },
        { id: "date2", name: "date2", type: "date"  , readonly:false, width: "100", align: 'center' }
    ];