How to use document.body

Visible area width of web page: document.body.clientWidth;

Height of visible area of ​​web page: document.body.clientHeight ;
The width of the visible area of ​​the web page: document.body.offsetWidth (including the width of the edge);
The height of the visible area of ​​the web page: document.body.offsetHeight (including the width of the edge);
Full text width of webpage text: document.body.scrollWidth;
Full text height of webpage text: document.body.scrollHeight;
Height of webpage being scrolled: document.body.scrollTop;
The left side of the web page being scrolled: document.body.scrollLeft;
The top part of the main body of the web page: window.screenTop;
The left side of the main body part of the web page: window.screenLeft;
The height of the screen resolution: window.screen.height;
The width of the screen resolution: window.screen.width;
The height of the screen's available work area: window.screen.availHeight;
The width of the screen's available work area ：window.screen.availWidth;
scrollHeight: Get the scroll height of object.
scrollLeft: Set or get the distance between the left edge of the object and the leftmost end of the currently visible content in the window
scrollTop: Set or get the distance between the topmost edge of the object and the topmost visible content in the window
scrollWidth: Get the scroll width of the object
offsetHeight: Get the height of the object relative to the layout or the parent coordinate specified by the parent coordinate offsetParent Property
offsetLeft: Get the height of the object relative to the layout or by offsetParent The calculated left position of the parent coordinate specified by the property
offsetTop: Gets the calculated top position of the object relative to the layout or the parent coordinate specified by the offsetTop property
event.clientX The horizontal coordinate relative to the document
event.clientY Vertical coordinates relative to the document
event.offsetX Horizontal coordinates relative to the container
event.offsetY Vertical coordinates relative to the container
document.documentElement.scrollTop Value for vertical scrolling
event.clientX+document. documentElement.scrollTop is the horizontal coordinate relative to the document + the amount of vertical scrolling
Post by molong on 2009-05-19 11:57 PM #1
To get the vertical coordinate position of the scroll bar on the current page, use:
document.documentElement.scrollTop;
Instead of:
document.body.scrollTop;
documentElement corresponds to the html tag, and body corresponds to the body tag.
Under the standard w3c, document.body.scrollTop is always 0 and needs to be replaced by document.documentElement.scrollTop;
If you want to position the absolute position of the mouse relative to the page, you You will find that 999.99 of the 1,000 articles in Google will ask you to use event.clientX+document.body.scrollLeft, event.clientY+document.body.scrollTop. If you find that your mouse positioning deviates from your imagination, please do not Strange, this is a normal thing.
The document.body.scrollX object is no longer supported after ie5.5.
So when programming, please add this judgment
if (document.body && document.body.scrollTop && document.body.scrollLeft)
{
top=document.body.scrollTop;
left=document.body.scrollleft;  
}
if (document.documentElement && document.documentElement.scrollTop && document.documentElement.scrollLeft)
{
top=document.documentElement.scrollTop;
left=document.documentElement.scrollLeft;
}

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