hi,
i want to validate checkboxes where each checkbox has a different name
1.atleast one checkbox should be select.
2.not more than 4 checkboxes should be selected.
can any one tell me how to validate this.
queenc
-1
Junior Poster
Recommended Answers
Jump to PostTry following code
<html> <script lang='javascript'> var checkedcount=0; function validate() { if (checkedcount<=0 || checkedcount>4 ) { alert('Select one to four options!'); return false; } } function checkinfo(chkbox) { if(chkbox.checked==true) checkedcount++; else checkedcount--; } </script> <body> <form name=frm action=some.php method=post> <input type=checkbox id=chk[0] name=chk[0] value=0 onclick='javascript:checkinfo(this);' > …
Jump to Posttry it please
<html> <script lang='javascript'> var count=0; function check(mychkbox) { if(mychkbox.checked==true) count++; else count--; if(count<=0) { alert('Must select one options!'); mychkbox.checked=true; return false; } else if(count>3) { alert('You can maximum Select four options!'); mychkbox.checked=false; return false; } } </script> <body> <input type=checkbox name="chkbox1" value="1" onclick="check(this)" checked="checked" …
All 5 Replies
urtrivedi
276
Nearly a Posting Virtuoso
Try following code
<html>
<script lang='javascript'>
var checkedcount=0;
function validate()
{
if (checkedcount<=0 || checkedcount>4 )
{
alert('Select one to four options!');
return false;
}
}
function checkinfo(chkbox)
{
if(chkbox.checked==true)
checkedcount++;
else
checkedcount--;
}
</script>
<body>
<form name=frm action=some.php method=post>
<input type=checkbox id=chk[0] name=chk[0] value=0 onclick='javascript:checkinfo(this);' > Option 0<br>
<input type=checkbox id=chk[1] name=chk[1] value=1 onclick='javascript:checkinfo(this);' > Option 0<br>
<input type=checkbox id=chk[2] name=chk[2] value=2 onclick='javascript:checkinfo(this);' > Option 0<br>
<input type=checkbox id=chk[3] name=chk[3] value=3 onclick='javascript:checkinfo(this);' > Option 0<br>
<input type=checkbox id=chk[4] name=chk[4] value=4 onclick='javascript:checkinfo(this);' > Option 0<br>
<input type=checkbox id=chk[5] name=chk[5] value=5 onclick='javascript:checkinfo(this);' > Option 0<br>
<input type="submit" name="Submit" value="Next" class="button" onClick="return validate();">
</form>
</body>
</html>
queenc
-1
Junior Poster
i want the user to restrict by allowing him to select only 4 checkboxes.the checkboxes have a different name.
BzzBee
5
Posting Whiz
try it please
<html>
<script lang='javascript'>
var count=0;
function check(mychkbox)
{
if(mychkbox.checked==true)
count++;
else
count--;
if(count<=0)
{
alert('Must select one options!');
mychkbox.checked=true;
return false;
}
else if(count>3)
{
alert('You can maximum Select four options!');
mychkbox.checked=false;
return false;
}
}
</script>
<body>
<input type=checkbox name="chkbox1" value="1" onclick="check(this)" checked="checked" > first<br>
<input type=checkbox name="chkbox2" value="2" onclick="check(this)" > second<br>
<input type=checkbox name="chkbox3" value="3" onclick="check(this)" > third<br>
<input type=checkbox name="chkbox4" value="4" onclick="check(this)" > fourth<br>
<input type=checkbox name="chkbox5" value="5" onclick="check(this)" > fifth<br>
<input type=checkbox name="chkbox6" value="6" onclick="check(this)" > sixth<br>
</body>
</html>
BzzBee
5
Posting Whiz
that will be more effective
try it please
<html>
<script lang='javascript'>
var count=0;
function check(mychkbox)
{
if(mychkbox.checked==true)
{ count++; }
else
{ if(count>0){count--;} }
if(count<=0)
{
alert('Must select one options!'+count);
mychkbox.checked=true;
return false;
}
else if(count>3)
{
alert('You can maximum Select four options!'+count);
mychkbox.checked=false;
return false;
}
}
</script>
<body>
<input type=checkbox id="chkbox1" name="chkbox1" value="1" onclick="check(this)" checked="checked" > first<br>
<input type=checkbox id="chkbox2" name="chkbox2" value="2" onclick="check(this)" > second<br>
<input type=checkbox id="chkbox3" name="chkbox3" value="3" onclick="check(this)" > third<br>
<input type=checkbox id="chkbox4" name="chkbox4" value="4" onclick="check(this)" > fourth<br>
<input type=checkbox id="chkbox5" name="chkbox5" value="5" onclick="check(this)" > fifth<br>
<input type=checkbox id="chkbox6" name="chkbox6" value="6" onclick="check(this)" > sisth<br>
</body>
</html>
BzzBee
5
Posting Whiz
if you dont want even single check box checked by default then you should use this code
<html>
<script type="text/javascript" language="javascript">
var count=0;
function check(mychkbox)
{
if(mychkbox.checked==true)
{ count++; }
else
{ if(count>0){count--;} }
if(count>4)
{
alert('You can maximum Select four options!');
mychkbox.checked=false;
return false;
}
}
function validate()
{
if(document.myfrm.chkbox1.checked==false && document.myfrm.chkbox2.checked==false && document.myfrm.chkbox3.checked==false && document.myfrm.chkbox4.checked==false && document.myfrm.chkbox5.checked==false && document.myfrm.chkbox6.checked==false)
{
alert('Must select one options!');
mychkbox1.checked=true;
return false;
}
}
</script>
<body>
<form name="myfrm" id="myfrm" action="" method="post">
<input type=checkbox id="chkbox1" name="chkbox1" value="1" onclick="check(this)" > first<br>
<input type=checkbox id="chkbox2" name="chkbox2" value="2" onclick="check(this)" > second<br>
<input type=checkbox id="chkbox3" name="chkbox3" value="3" onclick="check(this)" > third<br>
<input type=checkbox id="chkbox4" name="chkbox4" value="4" onclick="check(this)" > fourth<br>
<input type=checkbox id="chkbox5" name="chkbox5" value="5" onclick="check(this)" > fifth<br>
<input type=checkbox id="chkbox6" name="chkbox6" value="6" onclick="check(this)" > sisth<br><br><br>
<input type="button" name="Save" value="Save" onclick="validate();"/>
</body>
</html>
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