validate the special character in textbox

Hi,

I am new to php and javascript. I facing the validated special character in text box.
in following code is my codes.

function addRowToTablesaved()
{
document.getElementById('btnDeleteselectedsaved').disabled =true;
document.getElementById('btnDeleteallsaved').disabled =true;
var tbl = document.getElementById('tblDocsaved');
var lastRow = tbl.rows.length;
// if there's no header row in the table, then iteration = lastRow + 1
var iteration = lastRow;
document.frmDocsaved.txtActualRowLengthsaved.value = iteration;
// alert('iteration is: ' + iteration);//jamayah debug
var row = tbl.insertRow(lastRow);
if(lastRow%2!=0){
row.style.backgroundColor = "#85CC2B";
}else{
row.style.backgroundColor = "#D9FFBB";
}
// 1
if(iteration<21){
var cell1 = row.insertCell(0);
var uploadadd = document.createElement('input');
uploadadd.type = 'file';
uploadadd.name = 'userfile' + iteration;
uploadadd.id = 'userfile' + iteration;
uploadadd.size = 70;
cell1.innerHTML = "&nbsp;" + iteration + ".&nbsp;";
cell1.appendChild(uploadadd);

//2
var cell2 = row.insertCell(1);
var txtCompanyname= document.createElement('input');
txtCompanyname.type = 'text';
txtCompanyname.name = 'txtFileDesc' + iteration;
txtCompanyname.id = 'txtFileDesc' + iteration;
txtCompanyname.size = 70;

cell2.innerHTML = "&nbsp;";
cell2.appendChild(txtCompanyname);

document.getElementById('btnAddsaved').disabled =false;
document.getElementById('btnRemovesaved').disabled =false;
document.getElementById('uploadsaved').disabled =false;
document.getElementById('btnEditsaved').disabled =true;
if(document.frmDocsaved.txtActualRowLengthsaved.value == '20'){
document.getElementById('btnAddsaved').disabled =true;
}
}else{
document.getElementById('btnAddsaved').disabled =true;
}
}

For your information, i try to add onkeyup

txtCompanyname.onKeyup = function() {
!(/^[A-zÑñ0-9]*$/i).test(f.value)?f.value = f.value.replace(/[^A-zÑñ0-9]/ig,''):null;
}

but it cant work.


Please write any suggestion to my problems.
Thanks

 

i just cant understand what you need. can you be more specific?

 

hi

i'm doing the validate textbox , so for those special key like !@#$%*()'" when user key in to the test box will automatic backspace.
i have a button called "add" and it apply this addRowToTablesaved() javascript
this button's function is addrowtable in my php .

from my code , user allow to attach files and allow write the file description.
When the user Key in the special key, the special character will automatic backspace.
so, i try to .onkeyup to apply this validate function but it not work.

thanks

Rgrd
fayee

 

I'm not going to code at one in the morning but that is a lot of code for a simple process. Here is a step through in doing what you're trying to achieve:

1. Write a function so that when the user releases the key, textbox text gets stored in a variable.
2. You use regex to match special character.
3. If match returns true remove the last character in the string.
4. Update textbox text with a new string.