DbNetGrid 05：selectPart 和headings

selectPart属性用来指定要显示的列，属性的值必须是javascript数组，如下：

document.all.dbnetgrid1.selectPart=["customerid","companyname","address","city","region","phone","fax"]

为这些列配上对应的标题，用到headings属性，值也必须是javascript数组，如下：

document.all.dbnetgrid1.headings=["CustomerCode","CustomerName","Address","City","Region","Phone","Fax"]

注意：selectPart和headings的元素个数一定要相等

动态改变heading信息

如果你想动态的访问一个heading单位，可以用getHeading方法，返回所提供列名的heading单元的引用。