<html>
<head>
<style type="text/css">>
.treeview ul{
margin: 0px;
padding: 0;
}
.treeview li {
background : url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_BZTUW82J_mGFDcuZMEf7yAsaQXvcJSIPiBRwJTL25YfFFKZUqV9wrcgmvp6bCnshgmN_VSVBRyI7fJ032Gu6ACISvx3Sg2Ov3u1AXUnroLnxF46OPM1yUlPC-DYlqtoaeHQyRUIdVFg/s400/list.gif) 3px 0 no-repeat white;
background-repeat : no-repeat;
list-style-type : none;
padding-left : 32px;
margin-bottom : 3px;
}
.treeview li.submenu {
background : url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYlpVpYYpPPmcRWxRnUv6XDdzjaR9cEhkDjK1HYpTefCqvVH0FM75mKNa-rcTvBj4Rh6_SKXCKHkaQPQdNF5El-kmuXi2ZK1RMts1gsdl83NPJ_iyAC5N9BKlx_7Mmvy-V4eg2cFVE9VY/s400/closed.gif) 3px 0 no-repeat white;
background-repeat : no-repeat;
cursor : pointer !important ;
list-style-type : none;
}
.treeview li.submenu ul {
display : none;
}
.treeview .submenu ul li {
cursor : default;
}
</style>
<script type="text/javascript" >
var persisteduls = new Object()
var ddtreemenu = new Object()
ddtreemenu.closefolder = "https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYlpVpYYpPPmcRWxRnUv6XDdzjaR9cEhkDjK1HYpTefCqvVH0FM75mKNa-rcTvBj4Rh6_SKXCKHkaQPQdNF5El-kmuXi2ZK1RMts1gsdl83NPJ_iyAC5N9BKlx_7Mmvy-V4eg2cFVE9VY/s400/closed.gif" //set image path to "closed" folder image
ddtreemenu.openfolder = "https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg034DfBAKs7Qi9SgXyn0P1grIhulUSIeSaxufKJh8LpyNE8UIZm88HTfZbxGrBkiG0Mxpo2fp4FI9VkoOAlxSxCOBIaPQ7W0YcAwlYge5_IB_2A09fqfosc1LwCjYAUpynZNkcLShcxJ8/s400/open.gif" //set image path to "open" folder image
ddtreemenu.list = "https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_BZTUW82J_mGFDcuZMEf7yAsaQXvcJSIPiBRwJTL25YfFFKZUqV9wrcgmvp6bCnshgmN_VSVBRyI7fJ032Gu6ACISvx3Sg2Ov3u1AXUnroLnxF46OPM1yUlPC-DYlqtoaeHQyRUIdVFg/s400/list.gif" // set image path to "list" image
//////////No need to edit beyond here///////////////////////////
ddtreemenu.createTree = function (treeid, enablepersist, persistdays) {
var ultags = document.getElementById(treeid).getElementsByTagName("ul")
if (typeof persisteduls[treeid] == "undefined")
persisteduls[treeid] = (enablepersist == true && ddtreemenu.getCookie(treeid) != "") ? ddtreemenu.getCookie(treeid).split(",") : ""
for (var i = 0; i < ultags.length; i++)
ddtreemenu.buildSubTree(treeid, ultags[i], i)
if (enablepersist == true) { //if enable persist feature
var durationdays = (typeof persistdays == "undefined") ? 1 : parseInt(persistdays)
ddtreemenu.dotask(window, function () { ddtreemenu.rememberstate(treeid, durationdays) }, "unload") //save opened UL indexes on body unload
}
}
ddtreemenu.buildSubTree = function (treeid, ulelement, index) {
var ultags = document.getElementById(treeid).getElementsByTagName("ul")
for (var i = 0; i < ultags.length; i++) {
ultags[i].style.display = "none"
var relvalue = "closed"
ultags[i].setAttribute("rel", relvalue)
ultags[i].parentNode.style.backgroundImage = "url(" + ddtreemenu.closefolder + ")"
}
ulelement.parentNode.className = "submenu"
if (typeof persisteduls[treeid] == "object") { //if cookie exists (persisteduls[treeid] is an array versus "" string)
if (ddtreemenu.searcharray(persisteduls[treeid], index)) {
ulelement.setAttribute("rel", "open")
ulelement.style.display = "block"
ulelement.parentNode.style.backgroundImage = "url(" + ddtreemenu.openfolder + ")"
ulelement.parentNode.style.backgroundRepeat = "no-repeat";
ulelement.parentNode.style.backgroundPosition = "0 .4em";
ulelement.parentNode.style.cursor = "pointer !important";
ulelement.parentNode.style.paddingLeft = "2em";
ulelement.parentNode.style.listStyleType= "none";
}
else {
ulelement.setAttribute("rel", "closed")
ulelement.parentNode.style.backgroundImage = "url(" + ddtreemenu.closefolder + ")"
ulelement.parentNode.style.backgroundRepeat = "no-repeat";
ulelement.parentNode.style.backgroundPosition = "0 .4em";
ulelement.parentNode.style.cursor = "pointer !important";
ulelement.parentNode.style.paddingLeft = "2em";
ulelement.parentNode.style.listStyleType= "none";
}
} //end cookie persist code
else if (ulelement.getAttribute("rel") == null || ulelement.getAttribute("rel") == false) {//if no cookie and UL has NO rel attribute explicted added by user
ulelement.setAttribute("rel", "closed")
ulelement.parentNode.style.backgroundImage = "url(" + ddtreemenu.closefolder + ")"
ulelement.parentNode.style.backgroundRepeat = "no-repeat";
ulelement.parentNode.style.backgroundPosition = "0 .4em";
ulelement.parentNode.style.cursor = "pointer !important";
ulelement.parentNode.style.paddingLeft = "2em";
ulelement.parentNode.style.listStyleType= "none";
} else if (ulelement.getAttribute("rel") == "open") {//else if no cookie and this UL has an explicit rel value of "open"
ddtreemenu.expandSubTree(treeid, ulelement) //expand this UL plus all parent ULs (so the most inner UL is revealed!)
}
ulelement.parentNode.onclick = function (e) {
var submenu = this.getElementsByTagName("ul")[0]
if (submenu.getAttribute("rel") == "closed") {
submenu.style.display = "block"
submenu.setAttribute("rel", "open")
ulelement.parentNode.style.backgroundImage = "url(" + ddtreemenu.openfolder + ")"
ulelement.parentNode.style.backgroundRepeat = "no-repeat";
ulelement.parentNode.style.backgroundPosition = "0 .4em";
ulelement.parentNode.style.cursor = "pointer !important";
ulelement.parentNode.style.paddingLeft = "2em";
ulelement.parentNode.style.listStyleType= "none";
}
else if (submenu.getAttribute("rel") == "open") {
submenu.style.display = "none"
submenu.setAttribute("rel", "closed")
ulelement.parentNode.style.backgroundImage = "url(" + ddtreemenu.closefolder + ")"
ulelement.parentNode.style.backgroundRepeat = "no-repeat";
ulelement.parentNode.style.backgroundPosition = "0 .4em";
ulelement.parentNode.style.cursor = "pointer !important";
ulelement.parentNode.style.paddingLeft = "2em";
ulelement.parentNode.style.listStyleType= "none";
}
ddtreemenu.preventpropagate(e)
}
ulelement.onclick = function (e) {
ddtreemenu.preventpropagate(e)
}
}
///*
ddtreemenu.expandSubTree = function (treeid, ulelement) { //expand a UL element and any of its parent ULs
var rootnode = document.getElementById(treeid)
var currentnode = ulelement
currentnode.style.display = "block"
currentnode.parentNode.style.backgroundImage = "url(" + ddtreemenu.openfolder + ")"
while (currentnode != rootnode) {
if (currentnode.tagName == "UL") { //if parent node is a UL, expand it too
currentnode.style.display = "block"
currentnode.setAttribute("rel", "open") //indicate it's open
currentnode.parentNode.style.backgroundImage = "url(" + ddtreemenu.openfolder + ")"
}
currentnode = currentnode.parentNode
}
}
ddtreemenu.flatten = function (treeid, action) { //expand or contract all UL elements
var ultags = document.getElementById(treeid).getElementsByTagName("ul")
for (var i = 0; i < ultags.length; i++) {
ultags[i].style.display = (action == "expand") ? "block" : "none"
var relvalue = (action == "expand") ? "open" : "closed"
ultags[i].setAttribute("rel", relvalue)
ultags[i].parentNode.style.backgroundImage = (action == "expand") ? "url(" + ddtreemenu.openfolder + ")" : "url(" + ddtreemenu.closefolder + ")"
}
}
ddtreemenu.rememberstate = function (treeid, durationdays) { //store index of opened ULs relative to other ULs in Tree into cookie
var ultags = document.getElementById(treeid).getElementsByTagName("ul")
var openuls = new Array()
for (var i = 0; i < ultags.length; i++) {
if (ultags[i].getAttribute("rel") == "open")
openuls[openuls.length] = i //save the index of the opened UL (relative to the entire list of ULs) as an array element
}
if (openuls.length == 0) //if there are no opened ULs to save/persist
openuls[0] = "none open" //set array value to string to simply indicate all ULs should persist with state being closed
ddtreemenu.setCookie(treeid, openuls.join(","), durationdays) //populate cookie with value treeid=1,2,3 etc (where 1,2... are the indexes of the opened ULs)
}
//*/
////A few utility functions below//////////////////////
ddtreemenu.getCookie = function (Name) { //get cookie value
var re = new RegExp(Name + "=[^;]+", "i"); //construct RE to search for target name/value pair
if (document.cookie.match(re)) //if cookie found
return document.cookie.match(re)[0].split("=")[1] //return its value
return ""
}
ddtreemenu.setCookie = function (name, value, days) { //set cookei value
var expireDate = new Date()
//set "expstring" to either future or past date, to set or delete cookie, respectively
var expstring = expireDate.setDate(expireDate.getDate() + parseInt(days))
document.cookie = name + "=" + value + "; expires=" + expireDate.toGMTString() + "; path=/";
}
ddtreemenu.searcharray = function (thearray, value) { //searches an array for the entered value. If found, delete value from array
var isfound = false
for (var i = 0; i < thearray.length; i++) {
if (thearray[i] == value) {
isfound = true
thearray.shift() //delete this element from array for efficiency sake
break
}
}
return isfound
}
///*
ddtreemenu.preventpropagate = function (e) { //prevent action from bubbling upwards
if (typeof e != "undefined")
e.stopPropagation()
else
event.cancelBubble = true
}
ddtreemenu.dotask = function (target, functionref, tasktype) { //assign a function to execute to an event handler (ie: onunload)
var tasktype = (window.addEventListener) ? tasktype : "on" + tasktype
if (target.addEventListener)
target.addEventListener(tasktype, functionref, false)
else if (target.attachEvent)
target.attachEvent(tasktype, functionref)
}
//*/
</script>
</head>
<body>
<a href="javascript:ddtreemenu.flatten('treemenu1', 'expand')">Expand +</a> | <a href="javascript:ddtreemenu.flatten('treemenu1', 'contact')">- Contract</a>
<p></p>
<ul id="treemenu1" class="treeview">
<li class="treeview">Computer Science
<ul>
<li><a href="http://tryhomework2.blogspot.com/2012/08/computer-computational-geometry.html">Computational Geometry</a></li>
<li><a href="http://tryhomework2.blogspot.com/2012/08/computer-computer-algorithms-2.html">Computer Algorithms - 2</a></li>
</ul>
</li>
<li class="treeview">Electronics
<ul>
<li><a href="http://tryhomework2.blogspot.com/2012/08/electronics-advanced-digital-signal.html">Advanced Digital Signal Processing</a></li>
<li><a href="http://tryhomework2.blogspot.com/2012/08/electronics-adaptive-signal-processing.html">Adaptive Signal Processing</a></li>
</ul>
</li>
</ul>
<script type="text/javascript">
//ddtreemenu.createTree(treeid, enablepersist, opt_persist_in_days (default is 1))
ddtreemenu.createTree("treemenu1", true)
</script>
</body>
</html>
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