Need help removing lines of text from a HTML file

I'm trying to find away to remove lines from an HTML file. What it would need to do is look at two tables which in line on the file and if they match the tables below remove them and 31 lines above them. <TABLE nowrap noflow cellpadding=0 cellspacing=0> <TR valign="middle" style=" font-family: Times New Roman; font-size: 12.375px; height: 11.82292px;"> <TD nowrap WIDTH=120px ALIGN=LEFT>Bad files: </TD> <TD nowrap WIDTH=577px ALIGN=LEFT>0 </TD> </TR> </TABLE> <TABLE nowrap noflow cellpadding=0 cellspacing=0> <TR valign="middle" style=" font-family: Times New Roman; font-size: 12.375px; height: 11.82292px;"> <TD nowrap WIDTH=120px ALIGN=LEFT>Bad Records: </TD> <TD nowrap WIDTH=577px ALIGN=LEFT>0 </TD> </TR> </TABLE> thanks for any help

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