Common methods for adding and removing JavaScript functions _javascript Tips

Ways to add a function
function addevent (node, type, listener) {
if (Node.addeventlistener) {
The method of the Consortium (DOM method)
The false meaning in the following statement is for the bubbling phase, and if true is for the capture phase (ie does not support capturing), the reason for this is false is to unify
Node.addeventlistener (type, listener, false);
return true;
else if (node.attachevent) {
Msie method (ie method)
Node[' E ' + type + listener] = listener;
Node[type + Listener] = function () {
Node[' E ' + type + listener] (window.event);
};
Node.attachevent (' on ' + type, Node[type + listener]);
return true;
}
return False if neither of the methods is available
return false;
}


Methods of removing functions
function removeevent (node, type, listener) {
if (Node.addeventlistener) {
Node.removeeventlistener (type, listener, false);
return true;
else if (node.detachevent) {
Node.detachevent (' on ' + type, listener);
return true;
}
return False if neither of the methods is available
return false;
}


The method to add a Load event is as follows
1.function Addloadevent (func) {
var oldonload=window.onload;
if (typeof window.onload!= "function") {
Window.onload=func;
}else{
Window.onload=function () {
Oldonload ();
Func ();
}
}
}
2.//using the Addevent method above
addevent (window, ' Load ', FN);