JS open new page in the middle of the screen implementation method _javascript tips

 <a href=" javascript:void (0) "onclick=" window.open (' http://www.jb51.net ', ' NewWindow ', ' height=500, width=900, top= ' +math.round (window.screen.height)/2<span style= "Font-family:arial, Helvetica, Sans-serif; " >-250</span><span style= "font-family:arial, Helvetica, Sans-serif;" >) + ', left= ' +math.round (window.screen.width)/2</span><span style= "Font-family:arial, Helvetica, Sans-serif; " >-450</span><span style= "font-family:arial, Helvetica, Sans-serif;" >) + ', Toolbar=no, Menubar=no, Scrollbars=no, Resizable=no,location=no, Status=no ') > agreed to Exchange </a></span > 

 </pre><pre code_snippet_id=" 1613432 "Snippet_file_name=" blog_2016 0317_3_5070514 "name=" code "class=" HTML "> 

<pre name= "code" class= "HTML" ><script> 
function Openwin () { 
var width=math.round ( Window.screen.width)/2<span style= "font-family:arial, Helvetica, Sans-serif;" >-400</span>); 
var height=math.round ((window.screen.height)/2<span style= "font-family:arial, Helvetica, Sans-serif;" >-200</span><span style= "font-family:arial, Helvetica, Sans-serif;" >);</span> 
window.open (' http://www.jb51.net ', ' newwindow ', ' height=200 ', width=400, top= ' +height+ ', Left= ' +width+ ', Toolbar=no, Menubar=no, Scrollbars=no, Resizable=no,location=no, Status=no ') 
} 
</script > 

Where yes/no can also use 1/0;pixel value as the specific value, the unit pixel.

Parameters	Take value range	Description
Alwayslowered	Yes/no	Specifies that the window is hidden behind all windows
Alwaysraised	Yes/no	Specifies that the window is suspended above all windows
Depended	Yes/no	Whether to close the parent window at the same time
Directories	Yes/no	Whether the NAV2 and 3 columns are visible
Height	Pixel value	Window height
Hotkeys	Yes/no	Set up a secure exit hotkey in a window without a menu bar
Innerheight	Pixel value	Pixel height of the document in the window
Innerwidth	Pixel value	Pixel width of the document in the window
Location	Yes/no	Whether the position bar is visible
MenuBar	Yes/no	Whether the menu bar is visible
Outerheight	Pixel value	Set the pixel height of a window (including a decorative border)
Outerwidth	Pixel value	Set the pixel width of a window (including a decorative border)
Resizable	Yes/no	Whether the window size can be adjusted
ScreenX	Pixel value	The pixel length of the window from the left edge of the screen
ScreenY	Pixel value	The pixel length of the window from the edge of the screen
ScrollBars	Yes/no	Whether a window can have a scroll bar
TitleBar	Yes/no	Whether the window topic bar is visible
Toolbar	Yes/no	Whether the window toolbar is visible
Width	Pixel value	The pixel width of the window
Z-look	Yes/no	Whether the window floats on top of other windows when it is activated

The above is small series for everyone to bring JS open a new page in the middle of the screen in the implementation of the whole content, I hope that we support cloud Habitat Community ~