Implement a page same as https://etherscan.io/balancecheck-tool to check the balance at block or time. ``` web3.eth.getBalance("0x48c4eef517b79ff5259374fed4245359d8fb3ea9", 12000000) 9.939611775469830887615e+21 ```
Implement a page same as https://etherscan.io/balancecheck-tool to check the balance at block or time.