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HOME > Javascript Tips & Tricks : การใช้งาน JavaScript ร่วมกับ Form > JavaScript Get/Read all element on Webpage

JavaScript Get/Read all element on Webpage

JavaScript Get/Read all element on Webpage เป็นตัวอย่างการ JavaScript กับ element ในการ ตรวจสอบ หรืออ่านค่า element ที่อยู่ในหน้า webpage ปัจจุบัน

get_all_elememt_textbox.html อ่านเฉพาะค่าที่เป็น tag <input> textbox

<html>
<head>
<title>ThaiCreate.Com Tutorial</title>
<script language="JavaScript">
	function fncCheck()
	{
			var elm;
			ele_text = document.frmMain.getElementsByTagName('input');
			for( i=0, elm; elm=ele_text.item(i++); )
			{
				
				if (elm.getAttribute('type') == "text")
				{
					alert("elm.name=" + elm.name);
					alert("elm.value=" + elm.value);
				}

			}
	}
</script>
</head>
<body>
<form name="frmMain" action="" method="post">
Text 1<input type="text" name="txt1" value=""> <br>
Text 2<input type="text" name="txt2" value=""> <br>
<input type="button" name="btnCheck" value="Check" OnClick="fncCheck();">
</form>
</body>
</html>

Screenshot

JavaScript Read/Get all Element

get_all_element.html อ่านค่า element ทั้งหมด เช่น <input> ทั้งหมด, listbox , hidden

<html>
<head>
<title>ThaiCreate.Com Tutorial</title>
<script language="JavaScript">
	function fncCheck()
	{
			var elm;
			ele_text = document.frmMain.getElementsByTagName('input');
			for( i=0, elm; elm=ele_text.item(i++); )
			{
				
				if (elm.getAttribute('type') == "text")
				{
					alert("elm.name=" + elm.name);
					alert("elm.value=" + elm.value);
				}

			}

			ele_hidden =  document.frmMain.getElementsByTagName('hidden');
			for( i=0, elm; elm=ele_hidden.item(i++); )
			{
				
				if (elm.getAttribute('type') == "hidden")
				{
					alert("elm.name=" + elm.name);
					alert("elm.value=" + elm.value);
				}

			}

			ele_textarea =  document.frmMain.getElementsByTagName('textarea');
			for( i=0, elm; elm=ele_textarea.item(i++); )
			{
				
				if (elm.getAttribute('type') == "textarea")
				{
					alert("elm.name=" + elm.name);
					alert("elm.value=" + elm.value);
				}

			}

			ele_select =  document.frmMain.getElementsByTagName('select-one');
			for( i=0, elm; elm=ele_select.item(i++); )
			{
				
				if (elm.getAttribute('type') == "select-one")
				{
					alert("elm.name=" + elm.name);
					alert("elm.value=" + elm.value);
				}

			}
	}
</script>
</head>
<body>
<form name="frmMain" action="" method="post">
Text 1<input type="text" name="txt1" value=""> <br>
Text 2<input type="text" name="txt2" value=""> <br>
<input type="button" name="btnCheck" value="Check" OnClick="fncCheck();">
</form>
</body>
</html>

Screenshot

JavaScript Read/Get all Element

ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน Source Code 2.0 ของทีมงานไทยครีเอท

ลองใช้ค้นหาข้อมูล


	By :	ThaiCreate.Com Team (บทความเป็นลิขสิทธิ์ของเว็บไทยครีเอทห้ามนำเผยแพร่ ณ เว็บไซต์อื่น ๆ)
	Score Rating :
	Create/Update Date :	2011-06-18 18:05:43 / 2011-06-20 18:27:30
	Download :	No files

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