¾È±Ô °øºÎ¹æ

Javascript & JQuery & CSS > Javascript - ¹®¼­°´Ã¼ °¡Á®¿À±â - getElementById() , getElementsByName() , getElementsByTagName() , getElemen

µî·ÏÀÏ : 2017-09-08 12:37 Á¶È¸¼ö : 53,815

1. getElementById()
  ¹®¼­°´Ã¼ Áß ID °ªÀ» °¡Á®¿À´Âµ¥ »ç¿ëµÇ´Â ÇÔ¼ö ÀÔ´Ï´Ù.
 
		// ¹®¼­ °´Ã¼¸¦ °¡Á®¿É´Ï´Ù.
		var header1 = document.getElementById('header_1');
		var header2 = document.getElementById('header_2');


		// ¹®¼­ °´Ã¼ÀÇ ¼Ó¼ºÀ» º¯°æÇÕ´Ï´Ù.
		header1.innerHTML = 'with getElementById()';
		header2.innerHTML = 'with getElementById()';

		<div id="header_1"> Header </div>
		<div id="header_2"> Header </div>
ÇÔ¼ö¸¦ ÀÌ¿ëÇØ ³Ñ¾î¿Â º¯¼ö¸¦ °´Ã¼·Î º¯°æÇÏ°í ½ÍÀ» °æ¿ì´Â ¾Æ·¡Ã³·³ ó¸® ÇÏ¸é µË´Ï´Ù.

		function test(form_name)
		{
			var OBJ = eval("document.getElementById('"+ form_name + "')");	
		}

2. getElementsByName()

¹®¼­°´Ã¼ Áß NAME  °ªÀ» °¡Á®¿À´Âµ¥ »ç¿ëµÇ´Â ÇÔ¼ö ÀÔ´Ï´Ù.

Àоîµå¸° °´Ã¼´Â ¹è¿­·Î ÀúÀåÀÌ µË´Ï´Ù.
 
	window.onload = function () {	
			alert(document.getElementsByName("point").length);

			var OBJ_Point = document.getElementsByName("point");

			//º¯¼ö OBJ_Point ´Â ¹®¼­ °´Ã¼¸¦ °¡Áö´Â ¹è¿­·Î µé¾î°ª´Ï´Ù. ¾Æ·¡Ã³·³ 󸮵˴ϴÙ.
	
			for (var i = 0; i < OBJ_Point.length; i++) {
				alert(OBJ_Point[i].value);
			}
		}

		<body>
			<input type="text" name="point" value="11" size='10'>
			<input type="text" name="point" value="22" size='10'>
			<input type="text" name="point" value="33" size='10'>
			<input type="text" name="point" value="44" size='10'>
			<input type="text" name="point" value="55" size='10'>
		</body>
3. getElementsByTagName()
¹®¼­¿¡ ÁöÁ¤µÈ ÅÂ±× °´Ã¼¸¦ ³ªÅ¸³À´Ï´Ù. °á°ú´Â ¹è¿­ Çü½ÄÀ̵DZ⠶§¹®¿¡ length¿¡¼­ »ç¿ëµÇ´Â ű×ÀÇ ¼ö¸¦ °¡Á® ¿À°Å³ª
ű׷Πǥ½ÃµÇ´Â ³»¿ëÀ» º¯°æÇÒ ¼öÀÖ½À´Ï´Ù.
 
		window.onload = function () {
			alert(document.getElementsByTagName("input").length);
			var OBJ_Point = document.getElementsByTagName("input");
	
			for (var i = 0; i < OBJ_Point.length; i++) {
				alert(OBJ_Point[i].type);
			}
		}

		<body>
			<input type="text" name="point" value="11" size='10'>
			<input type="text" name="point" value="22" size='10'>
			<input type="text" name="point" value="33" size='10'>
			<input type="text" name="point" value="44" size='10'>
			<input type="text" name="point" value="55" size='10'>
		</body>
4. getElementsByClassName()
ÁÖ¾îÁø Ŭ·¡½º À̸§ÀÌ ÁÖ¾îÁø ¿ä¼ÒÀÇ ÁýÇÕÀ» ¹ÝȯÇÕ´Ï´Ù.
document °³Ã¼¸¦ È£ÃâÇÏ¸é ·çÆ® ³ëµå¸¦ Æ÷ÇÔÇÏ¿© Àüü ¹®¼­¸¦ °Ë»öÇÕ´Ï´Ù. ÀÓÀÇÀÇ ¿ä¼Ò·Î getElementsByClassName¸¦ È£ÃâÇÒ ¼öÀÖ½À´Ï´Ù.
ÀÌ °æ¿ì¿¡´Â ÁÖ¾îÁø Ŭ·¡½º À̸§À» »ç¿ëÇÏ¿© ÁöÁ¤µÈ ·çÆ® ¿ä¼Ò ¾Æ·¡ÀÇ ¿ä¼Ò¸¸ ¹ÝȯÇÕ´Ï´Ù.






 
¡Ø Ȥ½Ã µµ¿òÀÌ µÇ¼Ì´Ù¸é ´ñ±Û¿¡ ÇѸ¶µð ³²°ÜÁÖ¼¼¿ä!
ÀÛ¼ºÀÚ   ºñ¹Ð¹øÈ£
ÀÚµ¿±Û ¹æÁö     (ÀÚµ¿±Û ¹æÁö ±â´ÉÀÔ´Ï´Ù.)
³»¿ë   ´ñ±Û´Þ±â 
À̸ÞÀÏ ¹®ÀÇ : cak0280@nate.com  
Copyright 2000 By ENTERSOFT.KR All Rights Reserved.