Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

javascript»ñµÃÊó±êµÄ¾ø¶ÔλÖÃ

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>
<body onmouseMove="getXY(event)">
<script language="JavaScript">
<!--
function mouseX(evt) {
if (evt.pageX) return evt.pageX;
else if (evt.clientX)
   return evt.clientX + (document.documentElement.scrollLeft ?
   document.documentElement.scrollLeft :
   document.body.scrollLeft);
else return null;
}
function mouseY(evt) {
if (evt.pageY) return evt.pageY;
else if (evt.clientY)
   return evt.clientY + (document.documentElement.scrollTop ?
   document.documentElement.scrollTop :
   document.body.scrollTop);
else return null;
}
function getXY(event)
{
    var e = event || window.event;
    var x = mouseX(e);
    var y = mouseY(e);
    document.getElementById("XY").innerHTML = "X:" + x + "<br />Y:" + y;
}
function getX(elementID)
{
        var el = elementID
        return el.offsetLeft
  
}
  
function getY(elementID)
{
        var el = elementID
        return el.offsetTop
  
}

function getElementPositionX(elemID)
{
   var offsetTrail = document.getElementById(elemID);
   var offsetLeft = 0;

   while(offsetTrail)
   {
      offsetLeft += offsetTrail.offsetLeft;


Ïà¹ØÎĵµ£º

javascriptѧϰ·½·¨

 1.²»¹ýÎÒ½ÌÄãÒ»¸öѧ×öÍøÒ³µÄ¼¼ÇÉ
ÿ¿´µ½Ò»¸öƯÁÁµÄÍøÒ³¾Í²é¿´Ï´úÂë
2.¿´ÕÅТÏéµÄÊÓÆµ
3¡£´Ó»ù´¡Ñ§Æð¡£È»ºóѧЩ»ù±¾µÄWEB¿ª·¢Ó¦ÓÃ
ÍÆ¼öÒ»¸öÍøÕ¾http://www.ccscript.cn/
¸ÃÕ¾Ïêϸ·ÖÀàJSµÄ»ù´¡,¶ÔÏó,¼«ÆäÓ¦Óã»
¸ÃÕ¾ÓжàÖÖµ±½ñÁ÷ÐеÄJS¿ò¼Ü£»
Õ¾ÄÚÖ÷´òJquery¿ò¼ÜµÄ»ù´¡¼°Ó¦Óã»
°üÀ¨ÌØÐ§´úÂëºÍÕ¹Ê¾ÌØÐ§£» ......

Javascript±Õ°ü£¨Closure£©


±Õ°ü£¨closure£©ÊÇJavascriptÓïÑÔµÄÒ»¸öÄѵ㣬ҲÊÇËüµÄÌØÉ«£¬ºÜ¶à¸ß¼¶Ó¦Óö¼ÒªÒÀ¿¿±Õ°üʵÏÖ¡£
ÏÂÃæ¾ÍÊÇÎÒµÄѧϰ±Ê¼Ç£¬¶ÔÓÚJavascript³õѧÕßÓ¦¸ÃÊǺÜÓÐÓõġ£
Ò»¡¢±äÁ¿µÄ×÷ÓÃÓò
ÒªÀí½â±Õ°ü£¬Ê×ÏȱØÐëÀí½âJavascriptÌØÊâµÄ±äÁ¿×÷ÓÃÓò¡£
±äÁ¿µÄ×÷ÓÃÓòÎ޷ǾÍÊÇÁ½ÖÖ£ºÈ«¾Ö±äÁ¿ºÍ¾Ö²¿±äÁ¿¡£
JavascriptÓïÑÔµÄÌØÊâÖ®´¦£¬¾ÍÔ ......

ÈçºÎ±ÜÃâJavascriptʼþ°ó¶¨³öÏÖÄÚ´æÐ¹Â©

"These memory leaks often
occur as a result of circular references between JavaScript objects and
objects within IE’s DOM (document object model)."
GPDE Team Blog
Ã÷ÏÔµÄDOM¶ÔÏóÓë JavaScript¶ÔÏóÑ­»·ÒýÓúܺÃÅжϣ¬ÄѵÄÊÇÒþº¬µÄÑ­»·ÒýÓÃÅжϣ¡
Òþº¬µÄÑ­»·ÒýÓÃÐèҪͨ¹ý×÷ÓÃÓòÁ´½øÐзÖÎöÅÐ ......

javascript ¸÷Öֵõ½ä¯ÀÀÆ÷¿í¶ÈºÍ¸ß¶ÈµÄº¯Êý

function getInfo()
{
    var s = "";
    s += " ÍøÒ³¿É¼ûÇøÓò¿í£º"+ document.body.clientWidth+"\n";
    s += " ÍøÒ³¿É¼ûÇøÓò¸ß£º"+ document.body.clientHeight+"\n";
    s += " ÍøÒ³¿É¼ ......

JavaScript summary

1. ÍøÒ³Öв¶»ñJavaScript´íÎóµÄÁ½ÖÖ·½·¨£º
ʹÓà onerror ʼþÊÇÒ»ÖÖÀÏʽµÄ±ê×¼µÄÔÚÍøÒ³Öв¶»ñ Javascript ´íÎóµÄ·½·¨
throw ÉùÃ÷µÄ×÷ÓÃÊÇ´´½¨ exception£¨Òì³££©¡£Äã¿ÉÒÔ°ÑÕâ¸öÉùÃ÷Óë try...catch ÉùÃ÷ÅäºÏʹÓã¬ÒÔ´ïµ½¿ØÖƳÌÐòÁ÷²¢²úÉú¾«È·´íÎóÏûÏ¢µÄÄ¿µÄ¡£
2.Á½¸öJavaScriptÎļþ¼äº¯ÊýµÄµ÷ÓÃ
http://space.flash8.net ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ