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HOME > Javascript Tips & Tricks : การใช้งาน JavaScript ร่วมกับ Form > Javascript Enter and AutoFocus Next Textbox (Up and Down Keyword)

Javascript Enter and AutoFocus Next Textbox (Up and Down Keyword)

JavaScript Enter and Cursor AutoFocus Next Textbox เป็นตัวอย่างการ JavaScript กับ Auto Focus Next Textbox คือเมื่อมีการกด Enter ใน Textbox ตัว Cursor จะเลื่อนไปยังตำแหน่งถัดไป

autofocus_next_textbox1.html

<html>
<head>
<title>ThaiCreate.Com Tutorial</title>
</head>
<body>
<form name="frmMain" action="" method="post">
<script language="JavaScript">
document.onkeydown = chkEvent 
	function chkEvent(e) {
		var keycode;
		if (window.event) keycode = window.event.keyCode; //*** for IE ***//
		else if (e) keycode = e.which; //*** for Firefox ***//
		if(keycode==13)
		{
			return false;
		}
	}

    function setNextFocus(objId){
        if (event.keyCode == 13){
            var obj=document.getElementById(objId);
            if (obj){
                obj.focus();
            }
        }
    }

</script>
Textbox 1 <input type="text" name="txt1" value="" onKeyDown="setNextFocus('txt2');"> <br>
Textbox 2 <input type="text" name="txt2" value="" onKeyDown="setNextFocus('txt3');"> <br>
Textbox 3 <input type="text" name="txt3" value=""><br>
<input type="submit" name="btnSubmit" value="Submit">
</form>
</body>
</html>

Screenshot

Javascript Enter and Cursor AutoFocus Next Textbox

autofocus_next_textbox2.html ตัวอย่างที่ 2 เมื่อถึง textbox สุดท้ายและจะมีการ submit form ด้วยการโยนค่า parameter ชื่อ submit

<html>
<head>
<title>ThaiCreate.Com Tutorial</title>
</head>
<body>
<form name="frmMain" action="" method="post">
<script language="JavaScript">
document.onkeydown = chkEvent 
	function chkEvent(e) {
		var keycode;
		if (window.event) keycode = window.event.keyCode; //*** for IE ***//
		else if (e) keycode = e.which; //*** for Firefox ***//
		if(keycode==13)
		{
			return false;
		}
	}

    function setNextFocus(objId){
        if (event.keyCode == 13){
			if(objId=='submit')
			{
				document.frmMain.submit();
			}
			else
			{
				var obj=document.getElementById(objId);
				if (obj){
					obj.focus();
				}
			}
        }
    }

</script>
Textbox 1 <input type="text" name="txt1" value="" onKeyDown="setNextFocus('txt2');"> <br>
Textbox 2 <input type="text" name="txt2" value="" onKeyDown="setNextFocus('txt3');"> <br>
Textbox 3 <input type="text" name="txt3" value="" onKeyDown="setNextFocus('submit');"><br>
<input type="submit" name="btnSubmit" value="Submit">
</form>
</body>
</html>

Screenshot

Javascript Enter and Cursor AutoFocus Next Textbox

autofocus_next_textbox3.html ตัวอย่างที่ 3 สามารถใช้ปุ่ม Up และปุ่ม Down ใน Keyboard เพื่อเลื่อน Cursor ขึ้นลงได้

<html>
<head>
<title>ThaiCreate.Com Tutorial</title>
</head>
<body>
<form name="frmMain" action="" method="post">
<script language="JavaScript">
document.onkeydown = chkEvent 
	function chkEvent(e) {
		var keycode;
		if (window.event) keycode = window.event.keyCode; //*** for IE ***//
		else if (e) keycode = e.which; //*** for Firefox ***//
		if(keycode==13)
		{
			return false;
		}
	}

    function setNextFocus(objId,objId2){

        if (event.keyCode == 13 || event.keyCode == 40){  // Submit and Down
			if(objId=='submit')
			{
				document.frmMain.submit();
			}
			else
			{
				var obj=document.getElementById(objId);
				if (obj){
					obj.focus();
				}
			}
        }
        if (event.keyCode == 38){  // Up
			if(objId2 != null)
			{
				var obj=document.getElementById(objId2);
				if (obj){
					obj.focus();
				}
			}
        }


    }

</script>
Textbox 1 <input type="text" name="txt1" value="" onKeyDown="setNextFocus('txt2',null);"> <br>
Textbox 2 <input type="text" name="txt2" value="" onKeyDown="setNextFocus('txt3','txt1');"> <br>
Textbox 3 <input type="text" name="txt3" value="" onKeyDown="setNextFocus('submit','txt2');"><br>
<input type="submit" name="btnSubmit" value="Submit">
</form>
</body>
</html>

สำหรับปุ่ม Up รหัส keyCode คือ 30
สำหรับปุ่ม Down รหัส keyCode คือ 40

Screenshot

Javascript Enter and Cursor AutoFocus Next Textbox

autofocus_next_textbox4.html ตัวอย่างที่ 4 อันนี้กรณีที่จำนวน Length ถูก Limit ไว้ก็จะทำการ Next ไปยัง Textbox ถัดไป

<html>
<head>
<title>ThaiCreate.Com Tutorial</title>
</head>
<body>
<form name="frmMain" action="" method="post">
<script language="JavaScript">

    function setNextFocus(ctrl,objId){
        if (ctrl.maxLength == ctrl.value.length){
            var obj=document.getElementById(objId);
            if (obj){
                obj.focus();
            }
        }
    }

</script>
Textbox 1 <input type="text" name="txt1" maxlength="4" value="" onKeyUp="setNextFocus(this,'txt2');"> <br>
Textbox 2 <input type="text" name="txt2" maxlength="4" value="" onKeyUp="setNextFocus(this,'txt3');"> <br>
Textbox 3 <input type="text" name="txt3" value=""><br>
<input type="submit" name="btnSubmit" value="Submit">
</form>
</body>
</html>

Screenshot

Javascript Enter and Cursor AutoFocus Next Textbox

ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน Source Code 2.0 ของทีมงานไทยครีเอท

ลองใช้ค้นหาข้อมูล


	By :	ThaiCreate.Com Team (บทความเป็นลิขสิทธิ์ของเว็บไทยครีเอทห้ามนำเผยแพร่ ณ เว็บไซต์อื่น ๆ)
	Score Rating :
	Create/Update Date :	2011-06-18 18:28:52 / 2011-10-26 21:49:27
	Download :	No files

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