I set used the customHead and frozen Column together,
but it was not working correctly.

Who can tell me the reason? plase!
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var colsOption = [
{id: 'no' , header: "Order No" , width :60 ,
frozen:true },
{id: 'employee' , header: "Employee" , width :80 },
{id: 'country' , header: "Country" , width :70 },
{id: 'customer' , header: "Customer" , width :80 },
{id: 'bill2005' , header: "2005" , width :60},
{id: 'bill2006' , header: "2006" , width :60},
{id: 'bill2007' , header: "2007" , width :60},
{id: 'bill2008' , header: "2008" , width :60},
{id: 'orderDate' , header: "Delivery Date" , width :100}
];
var gridOption={
id : grid_demo_id,
width: "500", //"100%", // 700,
height: "200", //"100%", // 330,
container : 'gridbox',
replaceContainer : true,
customHead : 'myHead1', dataset : dsOption ,
columns : colsOption,
toolbarContent : 'nav | goto',
pageSize : 20
};