1. Some concepts:
1. The mouse event has a bottom attribute: it returns an integer to indicate which mouse button was clicked.
BUG: Among the mouse events of IE and standard DOM, the only button attribute value with the same value is the "right-click" event, both of which return 2.
2. Event onmousedown: indicates the action of pressing the mouse button.
Event oncontextmenu: Another event triggered by clicking the mouse.
3. Method to interrupt the default event processing function: set returnValue=false in IE; call preventDefault() method in standard DOM.
4. Event object: ① In IE, the event object is an event attribute of the window object.
Disclaimer: 
②In the standard DOM, the event object is the only parameter of the event processing function.
Disclaimer: 
Solving compatibility: 
2. Implementation:
< ;p id="p1">Uncle Cat is a fat white cat !
Cut
window.onload=function(){
rightmenu('p1',' d1');
}
/****
* Encapsulate the right-click menu function:
* elementID The id of the element to customize the right-click menu
* menuID The id of the right-click menu DIv to be displayed
*/
function rightmenu(elementID,menuID){
var menu=document.getElementById(menuID); //Get the menu object
var element=document.getElementById(elementID);//Get the clicked element with a custom right button
element.onmousedown=function(aevent){ //Set the processing function for pressing the right mouse button of the element
//Position the menu relative to the mouse
}
}
menu.onmouseout=function(){ //Set the menu to be hidden when the mouse moves out of the menu
setTimeout(function(){menu.style.display="none";},400);
}
}
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