x Property

Internet Development Index

Sets or retrieves the x-coordinate, in pixels, of the mouse pointer's position relative to a relatively positioned parent element.


event.x [ = iX ]

Possible Values

iXInteger that specifies or receives the x-coordinate, in pixels.

The property is read/write. The property has no default value.

Expressions can be used in place of the preceding value(s), as of Microsoft® Internet Explorer 5. For more information, see About Dynamic Properties.


The property is read-only in Microsoft® Internet Explorer 4.0, and read/write in Internet Explorer 5 and later.

In browser versions earlier than Internet Explorer 5, the x property retrieves a coordinate relative to the client.

This property returns the x-coordinate of the closest relatively positioned parent element of the element that fires the event. If the event firing element is relatively positioned, then the x-coordinate from the boundary of the element is returned. If the event firing element and all of its parent elements are not relatively positioned, then the x property returns a coordinate relative to the body element.

If the mouse is outside the window when the event is called, this property returns -1.


This example displays the current mouse position in the browser's status window.

<BODY onmousemove="window.status = 'X=' + window.event.x +
' Y=' + window.event.y">

Standards Information

There is no public standard that applies to this property.

Applies To