Hey all,
The following function counts for number of characters in a text area
and displays
error msg when it exceeds a maximum limit
I would like to optimize this function so that its highly portable
and elegant
if anybody could do. It will be of great help. Also I would like to add
mincount
ie: a text less than mincount should raise error
----------------------
Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<script language="Javas cript">
function checkchars(txtA rea,maxLength)
{
txtArea.value = txtArea.value.s lice(0, maxLength);
if(txtArea.valu e.length>=maxLe ngth)
{
alert('Only 20 Characters are Allowed');
}
//Display Remaining characters can type in TextBox
document.getEle mentById('txtDi splay').value =maxLength -
txtArea.value.l ength
}
</script>
<TITLE> New Document </TITLE>
</HEAD>
<BODY>
<TEXTAREA name="txtAreaRe sume" rows="5" wrap="VIRTUAL" cols="40"
onkeyup="checkc hars(this,20)"> </TEXTAREA>
No of Characters Allowed: <INPUT TYPE="TEXT" name="txtDispla y"
id="txtDisplay " value=20 MaxLength=3 disabled=disabl ed
style="width:25 px;border=0" > <BR>
</BODY>
</HTML>
4  2234  pr**********@gm ail.com wrote: Hey all,
The following function counts for number of characters in a text area
and displays
error msg when it exceeds a maximum limit
I would like to optimize this function so that its highly portable
and elegant
if anybody could do. It will be of great help. Also I would like to add
mincount
ie: a text less than mincount should raise error
----------------------
Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<script language="Javas cript">
function checkchars(txtA rea,maxLength)
{
txtArea.value = txtArea.value.s lice(0, maxLength);
The line above is unneeded and destructive...
Why notthe following?
function checkchars(txtA rea,maxLength){
if(txtArea.valu e.length>=maxLe ngth){
alert('Only '+maxLength+' characters are allowed.');
}
}
<TEXTAREA name="txtAreaRe sume" rows="5" wrap="VIRTUAL" cols="40"
onkeyup="checkc hars(this,this. form.txtDisplay .value)"></TEXTAREA>
Mick
if(txtArea.valu e.length>=maxLe ngth) {
alert('Only 20 Characters are Allowed');
}
//Display Remaining characters can type in TextBox
document.getEle mentById('txtDi splay').value =maxLength -
txtArea.value.l ength
}
</script>
<TITLE> New Document </TITLE>
</HEAD>
<BODY>
<TEXTAREA name="txtAreaRe sume" rows="5" wrap="VIRTUAL" cols="40"
onkeyup="checkc hars(this,20)"> </TEXTAREA>
No of Characters Allowed: <INPUT TYPE="TEXT" name="txtDispla y"
id="txtDisplay " value=20 MaxLength=3 disabled=disabl ed
style="width:25 px;border=0" > <BR>
</BODY>
</HTML>
mick white wrote: pr**********@gm ail.com wrote:
Hey all,
The following function counts for number of characters in a text area
and displays
error msg when it exceeds a maximum limit
txtArea.value = txtArea.value.s lice(0, maxLength);
The line above is unneeded and destructive...
Why notthe following?
function checkchars(txtA rea,maxLength){
if(txtArea.valu e.length>=maxLe ngth){
/* if(txtArea.valu e.length>maxLen gth) */
Mick alert('Only '+maxLength+' characters are allowed.');
}
}
<TEXTAREA name="txtAreaRe sume" rows="5" wrap="VIRTUAL" cols="40"
onkeyup="checkc hars(this,this. form.txtDisplay .value)"></TEXTAREA>
Mick
What does this piece do ?
-----------------------------------
<TEXTAREA name="txtAreaRe sume" rows="5" wrap="VIRTUAL" cols="40"
onkeyup="checkc hars(this,this. form.txtDisplay .value)"></TEXTAREA>
-------------
I guess checkchars() uses the value from this textbox
Is that right ?
pr**********@gm ail.com wrote: What does this piece do ?
-----------------------------------
<TEXTAREA name="txtAreaRe sume" rows="5" wrap="VIRTUAL" cols="40"
onkeyup="checkc hars(this,this. form.txtDisplay .value)"></TEXTAREA>
-------------
I guess checkchars() uses the value from this textbox
Is that right ?
It passes the value of "txtDisplay " to the checkchars() function, this
way you don't have to hard code the "maximum".
Mick This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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