How to position cursor in the textbox

Two empty textboxes
<asp:TextBox ID="busfaxtextBox" runat="server" Text='<%# Bind("busfax") %>' Width="100" onfocus="setFocus(this);" onblur="lostFocus(this);"/> <asp:TextBox ID="websiteTextBox" runat="server" Text='<%# Bind("website") %>' Width="100" onfocus="setFocus(this);" onblur="lostFocus(this);"/> when the user clicks in the first, the cursor is positioned at the left start position. Whe the user clicks in the second, the cursor remains in the middle of the textbox. Why would this be the case and how can I cause the second to behave like the first? (The JS only changes colors.)
Thanks 
 
 
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