EasyUI DataGrid 时间格式化、字符串长度截取

<table id="tbList" style="height: 340px;" striped="true" rownumbers="true"  iconcls="icon-edit" nowrap="false"  idfield="Id" url="@Url.Action("ListData")">
　　<tr>
　　　　 <th field="Date" formatter="Common.DateFormatter" width="80">
日期
</th>
<th field="Date" formatter="Common.TitleFormatter" width="100">
标题
</th>
　　</tr>
</table>

var Common = {

//EasyUI用DataGrid用日期格式化
TimeFormatter: function (value, rec, index) {
if (value == undefined) {
return "";
}
/*json格式时间转js时间格式*/
value = value.substr(1, value.length - 2);
var obj = eval('(' + "{Date: new " + value + "}" + ')');
var dateValue = obj["Date"];
if (dateValue.getFullYear() < 1900) {
return "";
}
var val = dateValue.format("yyyy-mm-dd HH:MM");
return val.substr(11, 5);
},
DateTimeFormatter: function (value, rec, index) {
if (value == undefined) {
return "";
}
/*json格式时间转js时间格式*/
value = value.substr(1, value.length - 2);
var obj = eval('(' + "{Date: new " + value + "}" + ')');
var dateValue = obj["Date"];
if (dateValue.getFullYear() < 1900) {
return "";
}

return dateValue.format("yyyy-mm-dd HH:MM");
},

//EasyUI用DataGrid用日期格式化
DateFormatter: function (value, rec, index) {
if (value == undefined) {
return "";
}
/*json格式时间转js时间格式*/
value = value.substr(1, value.length - 2);
var obj = eval('(' + "{Date: new " + value + "}" + ')');
var dateValue = obj["Date"];
if (dateValue.getFullYear() < 1900) {
return "";
}

return dateValue.format("yyyy-mm-dd");
},
TitleFormatter : function (value, rec, index) {
if (value.length > 10) value = value.substr(0, 8) + "...";
return value;
},
LongTitleFormatter: function (value, rec, index) {
if (value.length > 15) value = value.substr(0, 12) + "...";
return value;
}
};