Change the stack order of an <img> element:
The zIndex property sets or returns the stack order of a positioned element.
An element with greater stack order (1) is always in front of another element with lower stack order (0).
Tip: A positioned element is an element with the position property set to: relative, absolute, or fixed.
Tip: This property is useful if you want to create overlapping elements.
The zIndex property is supported in all major browsers.
Return the zIndex property:
Set the zIndex property:
|auto||The browser determines the stack order of the element (based on its order in the document). This is default|
|number||An integer that defines the stack order of the element. Negative values are allowed|
|initial||Sets this property to its default value. Read about initial|
|inherit||Inherits this property from its parent element. Read about inherit|
|Return Value:||A String, representing the stack order of an element|
Change the z-index property value of an <div> element:
Return the z-index property value of an <img> element:
CSS tutorial: CSS Positioning
CSS reference: z-index property