/* Function to addEventListener to onload
 * @param func - a function which should be executed once the page has loaded
 * http://simon.incutio.com/archive/2004/05/26/addLoadEvent
 * it will work even if something has previously been assigned to window.onload
 * without using addLoadEvent itself. 
 */

function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {
            oldonload();
            func();
        }
    }
}

/*
 * Function to open a popup window
 * @param thefield
 *     the field to clear
 *--------------------------------------------------------------------*/

function cleartext(thefield) {
	if (thefield.defaultValue == thefield.value) {
		thefield.value = "";
	}
}

/*
 * Function to toggle between content
 * @param elem
 *     the element to toggle
 * @param sibling
 *     the sibling to toggle
 *--------------------------------------------------------------------*/

function toggle(elem, sibling) {

	//document.getElementById(elem).style.display = 'table';
	document.getElementById(elem).style.display = (navigator.userAgent.indexOf("MSIE") != -1) ? 'block' : 'table'; // IE needs display: block, others need display: table-row
	document.getElementById(sibling).style.display = 'none';
	
	document.getElementById(elem+'_link').className = 'active';
	document.getElementById(sibling+'_link').className = '';
	
}

/*
 * Function to show/hide content in archive
 * @param elem
 *     the element clicked
 * @param sibling
 *     the sibling to toggle
 *--------------------------------------------------------------------*/

function show_archive(elem, sibling) {

	if (elem.parentNode.parentNode.parentNode.className == 'open') {
		document.getElementById(sibling).className = 'closed';
		elem.parentNode.parentNode.parentNode.className = '';
	}
	else {
		document.getElementById(sibling).className = '';
		elem.parentNode.parentNode.parentNode.className = 'open';
	}
}

/*
 * Function to show/hide entries for friends
 * @param elem
 *     the element clicked
 * @param sibling
 *     the sibling to toggle
 *--------------------------------------------------------------------*/

function show_entries(elem, sibling) {
	if (elem.parentNode.parentNode.className == 'open') {
		document.getElementById(sibling).className = 'closed';
		elem.parentNode.parentNode.className = '';
		elem.parentNode.childNodes[1].className = '';
		//elem.innerHTML = '+';
	}
	else {
		document.getElementById(sibling).className = '';
		elem.parentNode.parentNode.className = 'open';
		elem.parentNode.childNodes[1].className = 'bold';
		//elem.innerHTML = '-';
	}
	return false;
}

/*
 * Function to beautify code samples
 *--------------------------------------------------------------------*/

function replace_code() {
	var tab_width = 20;
	var code = document.getElementsByTagName('textarea');
	for (i=0; i<code.length; i++) {
		if (code[i].className == 'rCode') { // loop through all textareas with the 'code' class
			
			code[i].id = 'rCode' + i;
			var codelist = document.createElement('ol');
			codelist.id = 'rCodelist' + i;
			codelist.className = 'rCode';
			code[i].style.display = 'none';
			
			var lines = '';
			var line = code[i].innerHTML.split(/\n/);
			
			for (j=0; j<line.length; j++) {
				li = document.createElement('li');
				
				var spacer = '';
				var tabs = line[j].match(/^(\t*)/);

				line[j] = line[j].replace(/^\t+/, ''); // replace tabs
				line[j] = line[j].replace(/&lt;/g, '<'); // replace &lt; with <
				line[j] = line[j].replace(/&gt;/g, '>'); // replace &gt; with >
				
				if(line[j].match(/^[\n\r]*$/)) { // blank lines
					li.appendChild(document.createTextNode('\u00a0'));
				}
				else {
					codeline = document.createElement('code');
					codeline.appendChild(document.createTextNode(line[j]));
					li.appendChild(codeline);
					li.style.paddingLeft = tabs[1].length * tab_width + 'px';
				}
				codelist.appendChild(li);			
			}
						
			// Add toggle link
			var togglepara = document.createElement('p');
			var toggle = document.createElement('a');
			toggle.setAttribute('href', 'javascript:toggle_code(' + i + ');');
			//toggle.setAttribute('onclick', 'toggle_code(' + i + '); return false;');
			toggle.appendChild(document.createTextNode('Toggle Code'));
			togglepara.appendChild(toggle);
			
			document.getElementById('rCode'+i).parentNode.insertBefore(togglepara, document.getElementById('rCode'+i).nextSibling);
			document.getElementById('rCode'+i).parentNode.insertBefore(codelist, document.getElementById('rCode'+i).nextSibling);
		}
	}
}
addLoadEvent(replace_code);

/*
 * Function to toggle the code samples
 * @param code_num
 *     the number assigned to the code sample (numbered sequentially)
 *--------------------------------------------------------------------*/

function toggle_code(code_num) {
	if (document.getElementById('rCode'+code_num).style.display == 'none') {
		document.getElementById('rCode'+code_num).style.display = 'block';
		document.getElementById('rCodelist'+code_num).style.display = 'none';
	}
	else {
		document.getElementById('rCode'+code_num).style.display = 'none';
		document.getElementById('rCodelist'+code_num).style.display = 'block';
	}
}

/* Functions to create rounded corners 
 *     http://pro.html.it/articoli/id_599/idcat_31/pag_1/pag.html
 *--------------------------------------------------------------------*/

function NiftyCheck(){
if(!document.getElementById || !document.createElement)
    return(false);
isXHTML=/html\:/.test(document.getElementsByTagName('body')[0].nodeName);
if(Array.prototype.push==null){Array.prototype.push=function(){
      this[this.length]=arguments[0]; return(this.length);}}
return(true);
}

function Rounded(selector,wich,bk,color,opt){
var i,prefixt,prefixb,cn="r",ecolor="",edges=false,eclass="",b=false,t=false;

if(color=="transparent"){
    cn=cn+"x";
    ecolor=bk;
    bk="transparent";
    }
else if(opt && opt.indexOf("border")>=0){
    var optar=opt.split(" ");
    for(i=0;i<optar.length;i++)
        if(optar[i].indexOf("#")>=0) ecolor=optar[i];
    if(ecolor=="") ecolor="#666";
    cn+="e";
    edges=true;
    }
else if(opt && opt.indexOf("smooth")>=0){
    cn+="a";
    ecolor=Mix(bk,color);
    }
if(opt && opt.indexOf("small")>=0) cn+="s";
prefixt=cn;
prefixb=cn;
if(wich.indexOf("all")>=0){t=true;b=true}
else if(wich.indexOf("top")>=0) t="true";
else if(wich.indexOf("tl")>=0){
    t="true";
    if(wich.indexOf("tr")<0) prefixt+="l";
    }
else if(wich.indexOf("tr")>=0){
    t="true";
    prefixt+="r";
    }
if(wich.indexOf("bottom")>=0) b=true;
else if(wich.indexOf("bl")>=0){
    b="true";
    if(wich.indexOf("br")<0) prefixb+="l";
    }
else if(wich.indexOf("br")>=0){
    b="true";
    prefixb+="r";
    }
var v=getElementsBySelector(selector);
var l=v.length;
for(i=0;i<l;i++){
    if(edges) AddBorder(v[i],ecolor);
    if(t) AddTop(v[i],bk,color,ecolor,prefixt);
    if(b) AddBottom(v[i],bk,color,ecolor,prefixb);
    }
}

function AddBorder(el,bc){
var i;
if(!el.passed){
    if(el.childNodes.length==1 && el.childNodes[0].nodeType==3){
        var t=el.firstChild.nodeValue;
        el.removeChild(el.lastChild);
        var d=CreateEl("span");
        d.style.display="block";
        d.appendChild(document.createTextNode(t));
        el.appendChild(d);
        }
    for(i=0;i<el.childNodes.length;i++){
        if(el.childNodes[i].nodeType==1){
            el.childNodes[i].style.borderLeft="1px solid "+bc;
            el.childNodes[i].style.borderRight="1px solid "+bc;
            }
        }
    }
el.passed=true;
}
    
function AddTop(el,bk,color,bc,cn){
var i,lim=4,d=CreateEl("b");

if(cn.indexOf("s")>=0) lim=2;
if(bc) d.className="artop";
else d.className="rtop";
d.style.backgroundColor=bk;
for(i=1;i<=lim;i++){
    var x=CreateEl("b");
    x.className=cn + i;
    x.style.backgroundColor=color;
    if(bc) x.style.borderColor=bc;
    d.appendChild(x);
    }
el.style.paddingTop=0;
el.insertBefore(d,el.firstChild);
}

function AddBottom(el,bk,color,bc,cn){
var i,lim=4,d=CreateEl("b");

if(cn.indexOf("s")>=0) lim=2;
if(bc) d.className="artop";
else d.className="rtop";
d.style.backgroundColor=bk;
for(i=lim;i>0;i--){
    var x=CreateEl("b");
    x.className=cn + i;
    x.style.backgroundColor=color;
    if(bc) x.style.borderColor=bc;
    d.appendChild(x);
    }
el.style.paddingBottom=0;
el.appendChild(d);
}

function CreateEl(x){
if(isXHTML) return(document.createElementNS('http://www.w3.org/1999/xhtml',x));
else return(document.createElement(x));
}

function getElementsBySelector(selector){
var i,selid="",selclass="",tag=selector,f,s=[],objlist=[];

if(selector.indexOf(" ")>0){  //descendant selector like "tag#id tag"
    s=selector.split(" ");
    var fs=s[0].split("#");
    if(fs.length==1) return(objlist);
    f=document.getElementById(fs[1]);
    if(f) return(f.getElementsByTagName(s[1]));
    return(objlist);
    }
if(selector.indexOf("#")>0){ //id selector like "tag#id"
    s=selector.split("#");
    tag=s[0];
    selid=s[1];
    }
if(selid!=""){
    f=document.getElementById(selid);
    if(f) objlist.push(f);
    return(objlist);
    }
if(selector.indexOf(".")>0){  //class selector like "tag.class"
    s=selector.split(".");
    tag=s[0];
    selclass=s[1];
    }
var v=document.getElementsByTagName(tag);  // tag selector like "tag"
if(selclass=="")
    return(v);
for(i=0;i<v.length;i++){
    if(v[i].className.indexOf(selclass)>=0){
        objlist.push(v[i]);
        }
    }
return(objlist);
}

function Mix(c1,c2){
var i,step1,step2,x,y,r=new Array(3);
if(c1.length==4)step1=1;
else step1=2;
if(c2.length==4) step2=1;
else step2=2;
for(i=0;i<3;i++){
    x=parseInt(c1.substr(1+step1*i,step1),16);
    if(step1==1) x=16*x+x;
    y=parseInt(c2.substr(1+step2*i,step2),16);
    if(step2==1) y=16*y+y;
    r[i]=Math.floor((x*50+y*50)/100);
    }
return("#"+r[0].toString(16)+r[1].toString(16)+r[2].toString(16));
}

/*
 * Function to set FAT on all links pointing to a comment
 *--------------------------------------------------------------------*/

function set_fat() {
	var links = document.getElementsByTagName('a'); // get all input elements
	
	for(var i = 0; i < links.length; i++) {
		if (links[i].href.indexOf('#comment') != -1 && document.getElementById(links[i].href.substring(links[i].href.indexOf('#comment')+1))) {
			links[i].onclick = function() { // Set the onmouseover for the buttons equal to button_name_on.gif
				Fat.fade_element(this.href.substring(this.href.indexOf('#comment')+1));
			}
		}
	}
}

/*
 * Function to round the corners on div.blurb
 *--------------------------------------------------------------------*/

function nifty_round() {
	if(!NiftyCheck())
	    return;
	Rounded("div.blurb", "all", "#FFF", "#F2F2F2", "smooth");
}

/*
 * Set onload event handlers
 *--------------------------------------------------------------------*/

addLoadEvent(nifty_round);
addLoadEvent(Fat.fade_all);
addLoadEvent(set_fat);