How do you pass the parameter to Object_ID when the table name is being passed in?

CREATE PROCEDURE spDropTable
    @sTableName VARCHAR(MAX)

AS

-- How does @sTableName fit in here?

    IF object_id('tempdb..#TmpNetAmt') IS NOT NULL
        DROP TABLE #TmpNetAmt

>The temp tables are not presented in INFORMATION_SCHEMA.TABLES view. You can use object_id for all tables
>

>IF object_id('tempdb..#TmpNetAmt') IS NOT NULL
>	DROP TABLE #TmpNetAmt
>

>
>>I wrote this function to test if a table exists:
>>
>>

>>CREATE FUNCTION dbo.fnTableExists
>>	(@sTableName VARCHAR(50))
>>
>>RETURNS TinyInt
>>AS
>>
>>	BEGIN
>>
>>		DECLARE @bTableExists TINYINT
>>		SET @bTableExists = 0
>>
>>		SELECT @bTableExists = 1
>>			WHERE EXISTS
>>				(SELECT Table_Name
>>					FROM INFORMATION_SCHEMA.TABLES
>>					WHERE LOWER(Table_Name) = LOWER(@sTableName))
>>
>>		RETURN @bTableExists
>>
>>	END
>>
>>

>>
>>Then I tried this and the return value is 0:
>>
>>

>>
>>SELECT t.iTrade_Id, t.decTrade_Ext_Price + t.decTrade_Shipping_Charge + t.decTrade_Other_Charge AS NetAmount
>>	INTO #TmpNetAmt
>>	FROM Trade t
>>
>>DECLARE @bTableExists TINYINT
>>SELECT @bTableExists = dbo.fnTableExists('#TmpNetAmt')
>>
>>SELECT @bTableExists -- Returns 0
>>

>>
>>However, DROP TABLE #TmpNetAmt works ok. The function works for regular tables.
>>
>>What am I doing wrong here?