JavaScript»ñÈ¡DOM½ÚµãÔªËØ
JavaScript»ñÈ¡DOM½ÚµãÔªËØ
ÔÚWebÓ¦ÓóÌÐòÌرðÊÇWeb2.0³ÌÐò¿ª·¢ÖУ¬¾³£Òª»ñÈ¡Ò³ÃæÖÐij¸öÔªËØ£¬È»ºó¸üиÃÔªËصÄÑùʽ¡¢ÄÚÈݵȡ£ÈçºÎ»ñÈ¡Òª¸üеÄÔªËØ£¬ÊÇÊ×ÏÈÒª½â¾öµÄÎÊÌâ¡£ÁîÈËÐÀοµÄÊÇ£¬Ê¹ÓÃJavaScript»ñÈ¡½ÚµãµÄ·½·¨ÓкܶàÖÖ£¬ÕâÀï¼òµ¥×öÒ»ÏÂ×ܽ᣺
ͨ¹ý¶¥²ãdocument½Úµã»ñÈ¡£º
1. document.getElement
ById(elementId)
¸Ã·½·¨Í¨¹ý½ÚµãµÄID£¬¿ÉÒÔ׼ȷ»ñµÃÐèÒªµÄÔªËØ£¬ÊDZȽϼòµ¥¿ì½ÝµÄ·½·¨¡£Èç¹ûÒ³ÃæÉϺ¬Óжà¸öÏàͬidµÄ½Úµã£¬ÄÇôֻ·µ»ØµÚÒ»¸ö½Úµã¡£Èç½ñ£¬ÒѾ³öÏÖÁËÈçprototype¡¢MootoolsµÈ¶à¸öJavaScript¿â£¬ËüÃÇÌṩÁ˸ü¼ò±ãµÄ·½·¨£º$(id)£¬²ÎÊýÈÔÈ»ÊǽڵãµÄid¡£Õâ¸ö·½·¨¿ÉÒÔ¿´×÷ÊÇdocument.getElementById()µÄÁíÍâÒ»ÖÖд·¨£¬²»¹ý$()µÄ¹¦ÄܸüΪǿ´ó£¬¾ßÌåÓ÷¨¿ÉÒԲο¼ËüÃǸ÷×ÔµÄAPIÎĵµ¡£
2. document.getElements
ByName(elementName)
¸Ã·½·¨ÊÇͨ¹ý½ÚµãµÄname»ñÈ¡½Úµã£¬´ÓÃû×Ö¿ÉÒÔ¿´³ö£¬Õâ¸ö·½·¨·µ»ØµÄ²»ÊÇÒ»¸ö½ÚµãÔªËØ£¬¶øÊǾßÓÐͬÑùÃû³ÆµÄ½ÚµãÊý×顣Ȼºó£¬ÎÒÃÇ¿ÉÒÔͨ¹ýÒª»ñÈ¡½ÚµãµÄij¸öÊôÐÔÀ´Ñ»·ÅжÏÊÇ·ñΪÐèÒªµÄ½Úµã¡£ ÀýÈ磺ÔÚHTMLÖÐcheckboxºÍradio¶¼ÊÇͨ¹ýÏàͬµÄnameÊôÐÔÖµ£¬À´±êʶһ¸ö×éÄÚµÄÔªËØ¡£Èç¹ûÎÒÃÇÏÖÔÚÒª»ñÈ¡±»Ñ¡ÖеÄÔªËØ£¬Ê×ÏÈ»ñÈ¡¸Ä×éÔªËØ£¬È»ºóÑ»·ÅжÏÊǽڵãµÄcheckedÊôÐÔÖµÊÇ·ñΪtrue¼´¿É¡£
3. document.g
etElements
ByTagName(tagName)
¸Ã·½·¨ÊÇͨ¹ý½ÚµãµÄTag»ñÈ¡½Úµã£¬Í¬Ñù¸Ã·½·¨Ò²ÊÇ·µ»ØÒ»¸öÊý×飬ÀýÈ磺document.getElementsByTagName('A')½«»á·µ»ØÒ³ÃæÉÏËùÓг¬Á´½Ó½Úµã¡£ÔÚ»ñÈ¡½Úµã֮ǰ£¬Ò»°ã¶¼ÊÇÖªµÀ½ÚµãµÄÀàÐ͵ģ¬ËùÒÔʹÓø÷½·¨±È½Ï¼òµ¥¡£µ«ÊÇȱµãÒ²ÊÇÏÔ¶øÒ×¼û£¬ÄǾÍÊÇ·µ»ØµÄÊý×é¿ÉÄÜÊ®·ÖÅÓ´ó£¬ÕâÑù¾Í»áÀ˷Ѻܶàʱ¼ä¡£ÄÇô£¬Õâ¸ö·½·¨ÊDz»ÊǾÍûÓÐÓô¦ÁËÄØ£¿µ±È»²»ÊÇ£¬Õâ¸ö·½·¨ºÍÉÏÃæµÄÁ½¸ö²»Í¬£¬Ëü²»ÊÇdocument½ÚµãµÄרÓз½·¨£¬»¹¿ÉÒÔÓ¦ÓÃÆäËûµÄ½Úµã¡£
ͨ¹ý¸¸½Úµã»ñÈ¡
1. parentObj.firstChild
Èç¹û½ÚµãΪÒÑÖª½Úµã£¨parentObj£©µÄµÚÒ»¸ö×Ó½Úµã¾Í¿ÉÒÔʹÓÃÕâ¸ö·½·¨¡£Õâ¸öÊôÐÔÊÇ¿ÉÒԵݹéʹÓõģ¬Ò²¾ÍÊÇÖ§³ÖparentObj.firstChild.firstChild.firstChild...µÄÐÎʽ£¬Èç´Ë¾Í¿ÉÒÔ»ñµÃ¸üÉî²ã´ÎµÄ½Úµã¡£
2. parentObj.lastChild
ºÜÏÔÈ»£¬Õâ¸öÊôÐÔÊÇ»ñÈ¡ÒÑÖª½Úµã£¨pare
Ïà¹ØÎĵµ£º
ÏÖÔÚµÄRIA£¨Rich Internet
applications)Ô½À´Ô½Á÷ÐУ¬JavascriptÔÚÕâÖмäÆðµ½Á˲»¿ÉºöÊÓµÄ×÷Óã¬Õâ¸öÊÀ½çÉÏ£¬ÍêÈ«²»ÓÃJSµÄÍøÕ¾Ó¦¸ÃºÜÉÙÁË£¬Ò»Ð©Óû§ÌåÑéºÃ
µÄÍøÕ¾£¬´ó¶à²ÉÓÃÁËFlash»òÕßJS£¬¶øÒÔJS¾Ó¶à¡£±ÈÈçÏñQunar£¬¾ÍÊÇÒÔJavascript +
AjaxΪÖ÷µÄÍøÕ¾£¬Ç°Ì¨Ò³ÃæÖ÷ÒªÊÇHTML£¬ºǫ́Éú³ÉJSONÊý¾Ý¡£ÔÙ±ÈÈç˵Ajax×îÔç´ó¹ ......
<html>
<body>
<mce:script language=javascript><!--
todayDate = new Date();
date = todayDate.getDate();
month= todayDate.getMonth() +1;
year= todayDate.getYear();
document.write("½ñÌìÊÇ")
document.write("<br>")
if(navigator.appName == "Netscape")
{
document.w ......
function EnhancedImage(src,onLoaded){
var self = this;
this.src = src;
this.width = 0;
this.height = 0;
this.onLoaded = onLoaded;
this.loaded = false;
this.image = null;
this.load = function(){
if(this.loaded)
return;
this. ......
click() ¶ÔÏó.click() ʹ¶ÔÏó±»µã»÷¡£
closed ¶ÔÏó.closed ¶ÔÏó´°¿ÚÊÇ·ñÒѹرÕtrue/false
clearTimeout(¶ÔÏó) Çå³ýÒÑÉèÖõÄsetTimeout¶ÔÏó
clearInterval(¶ÔÏó) Çå³ýÒÑÉèÖõÄsetInterval¶ÔÏó
confirm("ÌáʾÐÅÏ¢") µ¯³öÈ·ÈÏ¿ò£¬È·¶¨·µ»ØtrueÈ¡Ïû·µ»Øfalse
cursor:Ñùʽ ¸ü¸ÄÊó±êÑùʽ hand crosshair text wait help defa ......
½ñÌìÒ»¸öͬÊÂÐèҪʵÏÖÕâôһ¸öЧ¹û£¬ÓÚÊǾͲâÊÔÁËһϣ¬ÖмäµÄÂß¼ÓÃÁ˺ݳ¤Ê±¼ä£¬²»¹ý×îÖÕ»¹ÊǸã³öÀ´ÁË£¡´úÂëÓеãÓ·Ö×£¬Ã»Ê±¼äÓÅ»¯£¬ÓÐÓõ½ÀàËƹ¦ÄܵÄÅóÓÑ¿ÉÒÔ×Ô¼ºÓÅ»¯Ò»Ï£¡£¨Ðè¼ÓÈë×Ô¼ºµÄjqueryÎļþ£©
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-tran ......