make the jexcel javascript spreadsheet responsive to screen

I am trying to use Paul Hodel's "The Javascript Spreadsheet" click here

I have to specify width for each columns in colWidths. Spreadsheet is not viewable in different computer screens. Is it possible to make width of cells automatic to fit screen? (I am using a older version of jexcel jquery plugin)

$("#grid1").jexcel({
colHeaders: ['Column 1','Column 2','Free Text'],
colWidths: [120,100,100],
columns: [
    { type: 'dropdown', source: TestData },
    { type: 'dropdown', source: TestData2, filter : filterData },
    { type: 'text'}
]
});