Root Android Tablet without USB Cable
What is your android version?

If it is below 3.x, then you could use the browser to download one of these apps:


Univeral Androot (desinged for android 2.2)
z4root (desinged for android 2.2)
Gingerbreak (designed for Android 2.3.x)


If it is above 3.x, then you cannot use this method, as Google patched the method used in these cracks.