WINDOW event

The window event is a more important event, so I will explain it next.

1. Get the distance of the scroll bar of the page

　　 What is the scroll bar, that is, when the content of the web page is too much, the scroll wheel controls the up and down display or the left and right display;

< span style="color: #000000;">　　 add a scroll bar event to the window:

　　window.onscroll=function(){};

　　Pay attention to when obtaining the scroll bar distance

　　 Google does not recognize document.documentElement.scrollTop, document.body.scrollTop must be added; that is

　　var scrolltop=document.documentElement.scrollTop||document.body.scrollTop;

　　 Only in this way can it be compatible with various browsers. 
　　This event is generally used when an event is triggered when the page scrolls to a certain distance,
　　For example, the navigation bar of Jingdong:

 and when sliding to the bottom, an event that goes back to the top is launched

Several ways to open a new hyperlink:

1. Replace the current window, you can go back

　　html writing:

Effect: 　　

　　JS writing: Replace the current window , You can go back

　　 Effect: 　　

2. Replacing the current window can’t go back

　　html can’t do it ;

　　JS writing method: replace the current window, cannot go back

　　 Effect:

p>

3. Open in a new window, you can open multiple

　　html writing: in a new window Open, you can open multiple

　　 effects:

　　

　　JS writing method: Open in a new window, you can open more

　　 Effect:

4. Open in a new window, only one can be opened

　　html writing: new The window is open, only one can be opened

　　 Effect: < /p>

　　JS writing method: A new window opens, only one can be opened p>

　　 Effect:

Note:

　　Open window syntax:
　　var newWindow = window.open(url,name,webpage information)
　　name page The name cannot be omitted
Window.close() Note that some browsers are not allowed to close themselves
Some well-designed name attributes:
　 　 _self automatically get the name of the current window
not 　 bla _ nk Empty

　　 The above operation of only opening one page is brought by the name value, which is similar to taking a name for the previous URL and opening the webpage through the name value