Example:
______A______B______C______D. . .
1 TAB TITLE___HIDE MACRO___UNHIDEMACRO_
2____12_____52______42_____1 . . .
3____56_____24______45_____8 . . .
4____64_____26______41_____2 . . .
5_TAB TITLE_HIDE MACRO___UNHIDEMACRO_
6____red______B______Y_____U . . .
7____blue______R______Y_____D . . .
8____green__Y______Y_____U . . .

So I currently have a "Tab System" in my excel sheet. I do this because I have many many long tables so it is easier to view is I have the ability to hide and unhide tables with a click. I have a macro attached to a button in row 1 that when clicked hides all rows2-4 (above). Another macro button is next to it (still in row 1) that when clicked unhides rows 2-4. Likewise I have a macro in row 5 that when clicked hides rows 6-8 and a macro next to that (still in row 5) that unhides rows 6-8. This works great and my data is very tidy. However, I want to use this excel file as a templete (in other words I want to be able to use different data and just dump it in and everything is automatic. So here is my question. How would I write code that tells excel to check each row and as long as all cells in the row are not null then hide that row. Keep checking each row until it finds the first row that it NULL all the way across. I want it to hide no cells below that point. Does that make sense at all?

Using example above I want to be able to dump new data in:
______A______B______C______D. . .
1 TAB TITLE_______HIDE MACRO___UNHIDEMACRO_
2____16_____52______22_____1 . . .
3____56_____24______45_____8 . . .
4____64_____26______41_____2 . . .
5____34_____324_____3______4. . .
6_TAB TITLE______HIDE MACRO___UNHIDEMACRO_
7____red______B______Y_____U . . .
8____blue______R______Y_____D . . .
9____green__Y______Y_____U . . .

I want a macro in row 1 that hides rows 2-5 and a macro next to it that unhides rows 2-5. Similiaryly a macro in row 6 that hides rows 7-9 and a macro in row six that unhides rows 7-9. Thanks in advance