Remove htmlnode from a html formatted string

 I want to remove a particular htmlnode from a html formatted string.
I have a string
dim str as string="<html><head></head><body><div id="d1"><div id="d1d2"></div><object id="lyric1" ....></object></div></html>"
 
In the above line of code I want to remove the whole object node from that string. Remember object node can have as many attributes and childnodes.
Can any one help me on this.
 
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