Please add a 'clear' button to clear the whole inputing values.
$('#cc').combogrid({
panelWidth: 700,
idField: 'itemid',
textField: 'productname',
data: data,
columns: [[
{field:'itemid',title:'Item ID',width:80},
{field:'productname',title:'Product',width:120},
{field:'listprice',title:'List Price',width:80,align:'right'},
{field:'unitcost',title:'Unit Cost',width:80,align:'right'},
{field:'attr1',title:'Attribute',width:200},
{field:'status',title:'Status',width:60,align:'center'}
]],
fitColumns: true,
label: 'Select Item:',
labelPosition: 'top',
reversed: true,
icons:[{
iconCls:'icon-clear',
handler: function(e){
var v = $(e.data.target).combogrid('clear');
}
}]
})