Retrieves the x-coordinate of the mouse pointer's position relative to the user's screen. 
Syntax
event.screenX [ = iSize ]
Possible Values
| iSize | Integer 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.
Remarks
The property is read-only in Microsoft® Internet Explorer 4.0, and read/write in Internet Explorer 5 and later.
Standards Information
There is no public standard that applies to this property.
Applies To