treegrid 宽度自适应

$（"#tt"）.treegrid({

url: 
idField: 'id',
treeField: ,
fitColumns: true,
sortable: true,
cascadeCheck: true,
singleSelect: false,
// width:800,
width:getWidth(0.95),

})

function getWidth(percent){
    return $(window).width() * percent;
}