how to validate the checkedlistbox thru javascript

Posted Date: 11 Jul 2006 Posted By:: sudhagar Member Level: Silver Member Rank: 0 Points: 2 Responses: 3

hi i wanna give a validation to checkedlistbox..
@least 1 item shud be select in the list else i wanna give a message

Responses

#62763 Author: bhaskar Member Level: Bronze Member Rank: 0 Date: 12/Jul/2006 Rating: Points: 2
Java Script Function <script language="javascript"> function func1() { if (document.all('chk').checked==true ) { alert("You have selected the value"); } else { alert("Please Select the Check Box") } } </script>

#63324 Author:

sourirajan saravanan Member Level: Gold Member Rank: 237 Date: 17/Jul/2006 Rating: 2 out of 5

Points: 2



<HTML>
<HEAD>
<TITLE>Check Box Example </TITLE>
<SCRIPT LANGUAGE="javascript">
	function fun_Validate()
	{
		if ((document.frm.chk[0].checked==false) && (document.frm.chk[1].checked==false))
		{
			alert("Select food style!");
		}
		else if ((document.frm.chk[0].checked==true) || (document.frm.chk[1].checked==true))
		{
			alert("Thanks for your option");
		}
	}
</SCRIPT>
</HEAD>
<BODY>
	<FORM NAME="frm">
		<TABLE>
			<TR><TD colspan="2">Food Style</TD></TR>
			<TR><TD><INPUT TYPE="checkbox" name="chk">Vegetarian</TD></TR>
			<TR><TD><INPUT TYPE="checkbox" name="chk">Non-Vegetarian</TD></TR>
			<TR><TD colspan="2"> </TD></TR>
			<TR><TD colspan="2"><INPUT TYPE="button" NAME="btnValidate" VALUE="Submit" onClick="fun_Validate()"></TD></TR>
		</TABLE>
	</FORM>
</BODY>
</HTML>

#340937 Author: B. Gopal Surya Prakash Member Level: Silver Member Rank: 862 Date: 28/Jan/2009 Rating: Points: 3
To achieve this first of all u need to understand how does your checkbox list is rendered into browse[see viewsource of browser] Now you should be able to understand the below code. & Java Script Function <script language="javascript"> function func1() { if (document.all('checkbo').checked==true ) { alert("Selected"); } else { alert("Please select one") } } </script>

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