easyui datagird 列宽自适应

代码如下：

onLoadSuccess: function (data) {
                var rows = data.rows; //得到行数据  
                var columnMaxCharacter = new Array(); //该列最大字符数  
                //遍历所有行数据,获得该列数据的最大字符数  
                var propertys = Object.getOwnPropertyNames(rows[0]);
                for (var i = 0; i < rows.length; i++) {
                    for (var j = 0; j < propertys.length; j++) {
                        var s = eval('rows[' + i + '].' + propertys[j]);
                        //s = s.replace('<center>', ''); //屏蔽html标签  
                        //s = s.replace('</center>', '');
                        if ((typeof columnMaxCharacter[propertys[j]]) == 'undefined') {
                            columnMaxCharacter[propertys[j]] = 0;
                        }
                        if ( s != null) {
                            if (s.length > columnMaxCharacter[propertys[j]]) {
                                columnMaxCharacter[propertys[j]] = s.length;
                            }
                        }
                    }
                }

                //设置列宽度和字体  
                for (var j = 0; j < rows.length; j++) {
                    //得到该列的字体  
                    //    alert($("td[field='"+cls[j]+"'] div").get(0).currentStyle);  
                    // var fontSize=$("td[field='"+cls[j]+"'] div").get(0).currentStyle.fontSize;//获得字体大小  
                    //  fontSize= fontSize.replace("px","");//去掉px方便运算  
                    var fontSize = 12;
                    var w = fontSize * (columnMaxCharacter[propertys[j]] + 1); //求出宽度  
                    //设定该列的宽度  
                    $("td[field='" + propertys[j] + "'] div").width(w);
                }

            }