关于Blog顶部的滚动导航条代码_javascript技巧

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Anything here
Anything here


for(var t=0;t<1000;t++) document.writeln('Test content: line '+t+'
');


var g_myBodyInstance = document.body;
var g_myBodyInstanceString = "document.body";
if(document.compatMode != "BackCompat"){
// for looser.dtd
g_myBodyInstance = document.documentElement;
g_myBodyInstanceString = "document.documentElement";
}
var isMinNS4 = (navigator.appName.indexOf("Netscape") >= 0 &&
parseFloat(navigator.appVersion) >= 4) ? 1 : 0;
var isMinNS5 = (navigator.appName.indexOf("Netscape") >= 0 &&
parseFloat(navigator.appVersion) >= 5) ? 1 : 0;
var isMinIE4 = (document.all) ? 1 : 0;
var isMinIE5 = (isMinIE4 && navigator.appVersion.indexOf("5.") >= 0) ? 1 : 0;
var isMacIE = (isMinIE4 && navigator.userAgent.indexOf("Mac") >= 0) ? 1 : 0;

var getFFVersion=navigator.userAgent.substring(
navigator.userAgent.indexOf("Firefox")).split("/")[1];
//extra height in px to add to iframe in FireFox 1.0+ browsers
var FFextraHeight=getFFVersion<1.5? 16 : 0;

function getLayer(name) {
if (isMinNS5)
return document.getElementById(name);
else if (isMinIE4)
return eval('document.all.' + name);
else if (isMinNS4)
return findLayer(name, document);

return null;
}

function findLayer(name, doc) {

var i, layer;

for (i = 0; i < doc.layers.length; i++) {
layer = doc.layers[i];
if (layer.name == name)
return layer;
if (layer.document.layers.length > 0) {
layer = findLayer(name, layer.document);
if (layer != null)
return layer;
}
}

return null;
}

function moveLayerTo(layer, x, y) {
if (isMinIE4) {
layer.style.left = x;
layer.style.top = y;
}
else if (isMinNS5) {
layer.style.left = x+'px';
layer.style.top = y+'px';
}
else if (isMinNS4)
layer.moveTo(x, y);
}

function getPageLeft(layer) {

if (isMinIE4||isMinNS5)
return(layer.offsetLeft);
else if (isMinNS4)
return(layer.pageX);
return(-1);
}

function getPageTop(layer) {

if (isMinIE4||isMinNS5)
return(layer.offsetTop);
else if (isMinNS4)
return(layer.pageY);
return(-1);
}

function getPageScrollX() {

if (isMinIE4||isMinNS5)
return(g_myBodyInstance.scrollLeft);
else if (isMinNS4)
return(window.pageXOffset);
return(-1);
}

function getPageScrollY() {

if (isMinIE4||isMinNS5)
return(g_myBodyInstance.scrollTop);
else if (isMinNS4)
return(window.pageYOffset);
return(-1);
}

var g_p_zealNavigatorBar = null;
g_p_zealNavigatorBar = getLayer('zealNavigatorBar');
if(!isMinIE4){g_p_zealNavigatorBar.style.position = 'fixed';}
function reposzealNavigatorBar(){
if(isMinIE4){
try{
moveLayerTo(g_p_zealNavigatorBar,
getPageLeft(g_p_zealNavigatorBar),
getPageScrollY());
}catch(e){}
}
}
window.onresize = reposzealNavigatorBar;
window.onscroll = reposzealNavigatorBar;
window.onload = reposzealNavigatorBar;