Jquery retrieves the scroll bar height
Get the height of the display area of the browser: $ (window). Height ();
Obtain the width of the display area of the browser: $ (window). Width ();
Get the document height on the page: $ (document). Height ();
Get the document width: $ (document). Width ();
Obtain the vertical height of the scroll bar to the top: $ (document). scrolltop ();
Obtain the vertical width of the scroll bar to the left: $ (document). scrollleft ();
Calculate the element position and offset: $ (ID). offset ();
The offset method is a useful method that returns the offset information of the first element in the packaging set. By default, it is the offset information relative to the body. The result contains the top and left attributes.
Offset (options, results) options. relativeto specifies the ancestor element at the relative offset position. This element should be located by relative or absolute. If this parameter is omitted, it is relative to the body.
Options. Does scroll include the scroll bar? The default value is true.
Options. whether to include padding. The default value is false.
Options. Whether margin is included. The default value is true.
Options. Border determines whether to include the border. The default value is true.
Child page control parent page:
Parent.document.doc umentelement. scrolltop;
Parent.document.doc umentelement. clientheight;