表格的常用属性
基本属性有:width(宽度)、height(高度)、border(边框值)、cellspacing(表格的内宽,即表格与tr之间的间隔)、 cellpadding(表格内元素的间隔,即tr与tr之间的间隔)、bordercolorlight(表格的亮边框颜色)、 bordercolordark(表格的暗边框颜色)、bgcolor(表格的背景色)、background(表格的背景图片)、 bordercolor(表格边框的颜色)
表格内部分隔线的属性
起作用的是rules这个参数,它有三个值(cols,rows,none),
当rules=cols时,表格会隐藏横向的分隔线,也就是我们只能看到表格的列;
当rules=rows时,就隐藏了纵向的分隔线,也就是我们只能看到表格的行;
而当rules=none时,纵向分隔线和横向分隔线将全部隐 藏,我们就只能看到一个表格的外框了
表格外部分隔线的属性
表格外边框的显示与隐藏,是可以用frame参数来控制的。注意:只对表格的外边框起作用,对内部边、线不起作用
只显示上边框

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