easyui datagrid 搜索功能

 Array.prototype.contains = function(obj) {
            var i = this.length;
            while (i--) {
                if (this[i] === obj) {
                    return true;
                }
            }
            return false;
        };
//        查詢函數
        var tempIndex=[];
        function searchText(dg,t){ //參數：$("#datagrid"),$(”#text“)
            var dg = objs.addFoodsListGrid;
            var t = $('#searchFoodsList');

            dg.datagrid("unselectAll");
            var rows = dg.datagrid("getData").rows;
            console.log(rows);
            var columns = dg.datagrid('getColumnFields');
            console.log(columns);
            var searchVal = t.val();
            for(var i=0;i<rows.length;i++){
                for(var j=1;j<columns.length;j++){
                    if(rows[i][columns[j]].indexOf(searchVal)>=0){
                        if(!tempIndex.contains(i)){
                            dg.datagrid("selectRow",i);
                            tempIndex.push(i);
                            return;
                        }
                    }
                }
                if(i==(rows.length-1)){
                    tempIndex=[];
                }
            }
        }