Javascript with DIV for tool tip

style="cursor: hand; ime-mode: active; color: Red">[?] When the Purchase Requisition type is Expense, please select the applicable ledger code from the drop down list. When the Purchase Requisition type is Capital or Both, please select ledger code 13105 – Construction In Progress from the drop down list.
*Part Type:		*Preventative Maintenance Part: onmouseover="Div3.style.visibility='visible'" /> Indicates if the part is a preventative maintenance part that requires replacement on a regular basis (two or more times per year).