- wdtGrid Change grid size when browser size is changed

    - if user want to change grid size 

        wdtGrid.resize(grid1, width, height)
    
        (ex) wdtGrid.resize(400, 600); 
        (ex) wdtGrid.resize(400, null); 
        (ex) wdtGrid.resize(null, 600); 

    var grid1 = new WdtGrid('grid1');
    grid1.create(column, option);
    grid1.setData(data);

    function btn1(){
        grid1.resize(400, 300);
    }
    function btn2(){
        grid1.resize(800, 600);
    }