Applying style to asp:menu

Question

i set asp:menu orientation="Horizontal" , I kept my menu bottom of my page. when i click on parent menu corresponding menu items should be displayed from bottom to top.

Example:

Child1 : (sub menu of parent)

child2 : (sub menu of parent)

child3 : (sub menu of parent)

Parent

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currently i m getting as follows

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Parent

Child1 : (sub menu of parent)

child2 : (sub menu of parent)

child3 : (sub menu of parent)