Visible area width of web page: document.body.clientWidth
The height of the visible area of the web page: document.body.clientHeight
The width of the visible area of the web page: document.body.offsetWidth (including the width of the edges)
The height of the visible area of the web page: document.body.offsetHeight (including the width of the edge)
Full text width of web page body: document.body.scrollWidth
Full text height of web page body: document.body.scrollHeight
The height of the web page being scrolled: document.body.scrollTop
The left side of the web page being scrolled: document.body.scrollLeft
On the main body of the web page: window.screenTop
The left part of the main body of the web page: window.screenLeft
High screen resolution: window.screen.height
The width of the screen resolution: window.screen.width
Screen available work area height: window.screen.availHeight
Screen available work area width: window.screen.availWidth
HTML precise positioning: scrollLeft, scrollWidth, clientWidth, offsetWidth
scrollHeight: Gets the scroll height of the object.
scrollLeft: Sets or gets the distance between the left edge of the object and the leftmost end of the currently visible content in the window
scrollTop: Sets or gets the distance between the top of the object and the top of the visible content in the window
scrollWidth: Get the scroll width of the object
offsetHeight: Gets the height of the object relative to the layout or the parent coordinate specified by the offsetParent property of the parent coordinate.
offsetLeft: Gets the calculated left position of the object relative to the layout or the parent coordinate specified by the offsetParent property.
offsetTop: Gets the calculated top position of the object relative to the layout or parent coordinates specified by the offsetTop property
event.clientX horizontal coordinate relative to the document
event.clientY vertical coordinate relative to the document
event.offsetX horizontal coordinate relative to the container
event.offsetY vertical coordinate relative to the container
document.documentElement.scrollTop value of vertical scrolling
event.clientX+document.documentElement.scrollTop The horizontal coordinate relative to the document + the amount of vertical scrolling
The differences between IE and FireFox are as follows:
IE6.0, FF1.06+:
clientWidth = width + padding
clientHeight = height + padding
offsetWidth = width + padding + border
offsetHeight = height + padding + border
IE5.0/5.5:
clientWidth = width - border
clientHeight = height-border
offsetWidth = width
offsetHeight = height
(It needs to be mentioned: the margin attribute in CSS has nothing to do with clientWidth, offsetWidth, clientHeight, and offsetHeight)
Visible area width of web page: document.body.clientWidth
The height of the visible area of the web page: document.body.clientHeight
The width of the visible area of the web page: document.body.offsetWidth (including the width of the edges)
The height of the visible area of the web page: document.body.offsetHeight (including the height of the edge)
Full text width of web page body: document.body.scrollWidth
Full text height of web page body: document.body.scrollHeight
The height to which the web page is scrolled: document.body.scrollTop
The left side of the web page being scrolled: document.body.scrollLeft
On the main body of the web page: window.screenTop
The left part of the main body of the web page: window.screenLeft
The height of the screen resolution: window.screen.height
The width of the screen resolution: window.screen.width
Screen available work area height: window.screen.availHeight
Screen available work area width: window.screen.availWidth
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Technical points
The code in this section mainly uses some properties of the Document object regarding the window. The main functions and usage of these properties are as follows.
To get the size of the window, different properties and methods need to be used for different browsers: to detect the real size of the window, you need to use the properties of the Window under Netscape; under IE you need to go deep inside the Document to detect the body; In the DOM environment, if you want to get the size of the window, you need to pay attention to the size of the root element, not the element.
The innerWidth property of the Window object contains the inner width of the current window. The innerHeight property of the Window object contains the inner height of the current window.
The body attribute of the Document object corresponds to the tag of the HTML document. The documentElement property of the Document object represents the root node of the HTML document.
document.body.clientHeight represents the current height of the window where the HTML document is located. document.body.clientWidth represents the current width of the window where the HTML document is located.
Implement code
Copy the code code as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Please resize the browser window</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
</head>
<body>
<h2 align="center">Please resize the browser window</h2><hr>
<form action="#" method="get" name="form1" id="form1">
<!--Show the actual size of the browser window-->
Actual height of browser window: <input type="text" name="availHeight" size="4"><br>
Actual width of browser window: <input type="text" name="availWidth" size="4"><br>
</form>
<script type="text/javascript">
<!--
var winWidth = 0;
var winHeight = 0;
function findDimensions() //Function: Get dimensions
{
//Get window width
if (window.innerWidth)
winWidth = window.innerWidth;
else if ((document.body) && (document.body.clientWidth))
winWidth = document.body.clientWidth;
//Get window height
if (window.innerHeight)
winHeight = window.innerHeight;
else if ((document.body) && (document.body.clientHeight))
winHeight = document.body.clientHeight;
//Detect the body by going deep inside the Document to obtain the window size
if (document.documentElement && document.documentElement.clientHeight && document.documentElement.clientWidth)
{
winHeight = document.documentElement.clientHeight;
winWidth = document.documentElement.clientWidth;
}
//Output the results to two text boxes
document.form1.availHeight.value= winHeight;
document.form1.availWidth.value= winWidth;
}
findDimensions();
//Call the function and get the value
window.onresize=findDimensions;
//-->
</script>
</body>
</html>
Source program interpretation
(1) The program first creates a form that contains two text boxes to display the current width and height of the window, and their values will change as the window size changes.
(2) In the subsequent JavaScript code, two variables winWidth and winHeight are first defined to save the height and width values of the window.
(3) Then, in the function findDimensions (), use window.innerHeight and window.innerWidth to get the height and width of the window, and save them in the two aforementioned variables.
(4) Then detect the body by going deep into the Document, obtain the window size, and store it in the two variables mentioned above.
(5) At the end of the function, by accessing the form elements by name, the results are output to two text boxes.
(6) At the end of the JavaScript code, complete the entire operation by calling the findDimensions () function.