JS collapse other Menu functions

Last Update:2017-01-13 Source: Internet

Author: User

Tags setinterval

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<body onload = "Initmenu ()"

<div class= "Jsmenu" id= "Pm_menu"
    <!--The first level of classification;
    <div>
     <span class= "fath" > Industry information </span>
      <p class= "Son"
        <!--class= "current" is currently in level two classification;
         <a class= "Current" href= "#" > Industry news </a>
        <a href= "#" > Technology dynamic </A>
        <a href= "#" > Gossip review </a>
      </p>
     </div>
    <!--closed level classification;
     <div class= "collapsed"

       ...

</div>

<div><span class= "single" ><a href= "#" > Cool station </a></span></div>

....

Program Description:

The following are the referenced contents:

Start a program in a div with id "js_menu"
function Initmenu () {
var pm_menu = new Jsmenu ("Js_menu");
Pm_menu.init ();
}
Defining the main function
function Jsmenu (ID) {
if (!document.getelementbyid | |!document.getelementsbytagname)
return false;
This.menu = document.getElementById (ID);
This.submenus = This.menu.getElementsByTagName ("div");
}
Introduce a function to get all spans
JSMenu.prototype.init = function () {
var maininstance = this;
for (var i = 0; i < this.submenus.length; i++)
This.submenus[i].getelementsbytagname ("span") [0].onclick = function () {
Maininstance.togglemenu (This.parentnode);
};
This.expandone ();
};
Expand the menu with "current"
JSMenu.prototype.expandOne = function () {
for (var i = 0; i < this.submenus.length; i++) {
var links = this.submenus[i].getelementsbytagname ("a");
for (var j = 0; J < Links.length; J + +) {
if (Links[j].classname = = "current")
This.expandmenu (This.submenus[i]);
}
}
};
Transform Menu State function
JSMenu.prototype.toggleMenu = function (submenu) {
if (Submenu.classname = = "collapsed")
This.expandmenu (submenu);
Else
This.collapsemenu (submenu);
};
Expand All Menu Functions
JSMenu.prototype.expandMenu = function (submenu) {
var fullheight = Submenu.getelementsbytagname ("span") [0].offsetheight;
var links = submenu.getelementsbytagname ("a");
for (var i = 0; i < links.length; i++)
Fullheight + = Links[i].offsetheight;
var moveby = Math.Round (5 * links.length);

var maininstance = this;
var intId = setinterval (function () {
var curheight = submenu.offsetheight;
var newheight = curheight + moveby;
if (Newheight < fullheight)
Submenu.style.height = newheight + "px";
else {
Clearinterval (INTID);
Submenu.style.height = "";
Submenu.classname = "";
}
}, 30);
This.collapseothers (submenu);
};
Collapse Menu function
JSMenu.prototype.collapseMenu = function (submenu) {
var minheight = Submenu.getelementsbytagname ("span") [0].offsetheight;
var moveby = Math.Round (5 * submenu.getelementsbytagname ("a"). length);
var maininstance = this;
var intId = setinterval (function () {
var curheight = submenu.offsetheight;
var newheight = Curheight-moveby;
if (Newheight > MinHeight)
Submenu.style.height = newheight + "px";
else {
Clearinterval (INTID);
Submenu.style.height = "";
Submenu.classname = "collapsed";
}
}, 30);
};
Collapse other menu functions
JSMenu.prototype.collapseOthers = function (submenu) {
for (var i = 0; i < this.submenus.length; i++)
if (This.submenus[i]!= submenu && this.submenus[i].classname!= "collapsed")
This.collapsemenu (This.submenus[i]);
};

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