/*
Link Thumbnail v2.0.1
(c) Arc90, Inc.
http://www.arc90.com
http://lab.arc90.com
Licensed under : Creative Commons Attribution 2.5 http://creativecommons.org/licenses/by/2.5/
*/
/* Globals */
var arc90_navigator = navigator.userAgent.toLowerCase();
var arc90_isOpera = arc90_navigator.indexOf('opera') >= 0? true: false;
var arc90_isIE = arc90_navigator.indexOf('msie') >= 0 && !arc90_isOpera? true: false;
var arc90_isSafari = arc90_navigator.indexOf('safari') >= 0 || arc90_navigator.indexOf('khtml') >= 0? true: false;
var arc90_linkThumbUseClassName = true;
var arc90_linksources = [['http://images.websnapr.com/?size=s&url=', 202, 152],
['http://thumbnails.alexa.com/image_server.cgi?size=small&url=', 160, 120],
['http://msnsearch.srv.girafa.com/srv/i?s=MSNSEARCH&r=', 160, 120]];
var arc90_linksource = 0;
function arc90_linkpic() {
var b = document.domain;
var A = document.getElementsByTagName('A');
for (var i = 0, l = A.length, c = 0; i < l; i++) {
var a = A[i];
var h = a.href;
if ((b == '' || h.indexOf(b) < 0) && h.indexOf('://') > 0 && ((arc90_linkThumbUseClassName && a.className.indexOf('linkthumb') >= 0) || !arc90_linkThumbUseClassName)) {
try {
a.className += ' arc90_linkpicLNK';
if (a.id == '')
a.id = 'arc90_link'+ i;
var d = arc90_newNode('div', 'arc90_linkpic'+ i, 'arc90_linkpic');
var m = arc90_newNode('img', '', 'arc90_linkpicIMG');
// var n = h.replace(/[^:]*:\/\/([^:\/]*)(:{0,1}\/{1}.*)/, '$1');
var n = escape(h);
m.src = arc90_linksources[arc90_linksource][0] + n;
m.width = arc90_linksources[arc90_linksource][1];
m.height = arc90_linksources[arc90_linksource][2];
m.style.width = arc90_linksources[arc90_linksource][1] +'px';
m.style.height = arc90_linksources[arc90_linksource][2] +'px';
m.border = 0;
m.alt = '[Picture of '+ n +']';
m.title = a.title;
d.style.zIndex = '9999';
d.style.position = 'absolute';
d.appendChild(m);
document.body.appendChild(d);
arc90_addEvent(a, 'mouseover', function () { arc90_showThumb(arc90_isIE? event.srcElement.id: this.id); } );
arc90_addEvent(a, 'mouseout', function () { arc90_hideThumb(arc90_isIE? event.srcElement.id: this.id); } );
} catch(err) {
a = null;
}
}
}
}
function arc90_showThumb(id) {
try {
var k = document.getElementById(id);
var top = arc90_findDimension(k, 'Top');
var lnh = arc90_getStyle(k, 'lineHeight', 'font-size');
var default_height = 20;
if (!lnh)
lnh = default_height;
else if (lnh.indexOf('pt') > 0)
lnh = parseInt(lnh) * 1.3;
else if (lnh.indexOf('em') > 0)
lnh = parseInt(lnh) * 10;
else if (lnh.indexOf('px') > 0)
lnh = parseInt(lnh);
else if (arc90_isNumeric(lnh))
lnh = parseInt(arc90_isIE? lnh * 10: arc90_isOpera? lnh/100: lnh); // IE brings back em units
else
lnh = default_height;
var lft = arc90_findDimension(k, 'Left');
var nlf = arc90_findMatchingDimensionViaNodes(k, 'Left', lft, 0);
var pid = id.replace(/arc90_link/, 'arc90_linkpic');
var p = document.getElementById(pid);
p.style.display = 'block';
p.style.top = (top + (arc90_isIE && nlf? lnh + 8: 4) + lnh) + 'px';
p.style.left = lft + 'px';
} catch(err) { return; }
}
function arc90_hideThumb(id) {
try {
var k = document.getElementById(id);
var pid = id.replace(/arc90_link/, 'arc90_linkpic');
var p = document.getElementById(pid);
p.style.display = 'none';
} catch(err) { return; }
}
function arc90_getStyle(obj, styleIE, styleMoz) {
if (arc90_isString(obj)) obj = document.getElementById(obj);
if (obj.currentStyle)
return obj.currentStyle[styleIE];
else if (window.getComputedStyle)
return document.defaultView.getComputedStyle(obj, null).getPropertyValue(styleMoz);
}
function arc90_findDimension(obj, pType) {
if (arc90_isString(obj)) obj = document.getElementById(obj);
var cur = 0;
if(obj.offsetParent)
while(obj.offsetParent) {
switch(pType.toLowerCase()) {
case "width":
cur += obj.offsetWidth; break;
case "height":
cur += obj.offsetHeight; break;
case "top":
cur += obj.offsetTop; break;
case "left":
cur += obj.offsetLeft; break;
}
obj = obj.offsetParent;
}
return cur;
}
function arc90_findMatchingDimensionViaNodes(obj, pType, matching, notMatching) {
var cur = 0, counter = 0;
notMatching = notMatching == null? -1: notMatching;
if(obj.parentNode)
while(obj.parentNode) {
cur = arc90_findDimension(obj, pType);
if (cur == matching && cur != notMatching)
counter++;
if (counter >= 2) return true;
obj = obj.parentNode;
}
return false;
}
/* Events */
function arc90_isString(o) { return (typeof(o) == "string"); }
function arc90_isNumeric(o) { return (typeof(parseFloat(o).toString() == 'NaN'? 'xxx': parseFloat(o)) == "number" && parseFloat(o) != ''); }
function arc90_addEvent(e, meth, func, cap) {
if (arc90_isString(e)) e = document.getElementById(e);
if (e.addEventListener){
e.addEventListener(meth, func, cap);
return true;
} else if (e.attachEvent)
return e.attachEvent("on"+ meth, func);
return false;
}
/* Nodes */
function arc90_newNode(t, i, s, x, c) {
var node = document.createElement(t);
if (x != null && x != '') {
var n = document.createTextNode(x);
node.appendChild(n);
}
if (i != null && i != '')
node.id = i;
if (s != null && s != '')
node.className = s;
if (c != null && c != '')
node.appendChild(c);
return node;
}
/* Onload */
arc90_addEvent(window, 'load', arc90_linkpic);
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