Question on Menu/Sub Menu

Hi everyone. I’m creating a website using the responsive theme in wordpress. I have the main menu selections going across the top of the page (below the main header picture). Several of these menu items have drop down (submenus). My issues is that when I click on the menu item it will go directly to that page….when I hover over that menu item it shows the submenu items. How can I turn off that main menu item?

I know this is hard to explain. An example: My menu across the top reads HOME ABOUT US SERVICES DONATE PHOTOS
Under the SERVICES option, there are several submenus (Utilities, Food, etc.) If I click fast on the SERVIES option, it will open up the original SERVICES page – which is blank. If I hover over the SERVICES menu and then click, I get the submenu which displays all those pages under SErVICES. I’m afraid users will just click on that SERVICES menu item and not hover and see the submenu. Is there a way to turn that SErVICES page off so a user cannot click on it and be taken to that blank page?

Thanks! Hope this makes sense.