Check for blank space as first character and trimming textbox i/p

**RamananKalirajan** · Sep 24 '10, 04:02 AM

Hi Divyanshi,
get the textbox content in a variable and check with the two properties as shown below

Ex:

Code:

   var txt = document.getElementById('textBox').value;
   if(txt.charAt(0)==' '){
     //what should be done for space
   }
   if(txt.length>100){
     //what should be done when the text content is more than 100 char
   }

Thanks and Regards
Ramanan Kalirajan

**Dormilich** · Sep 24 '10, 05:45 AM

regarding 2), limit the textbox to 100 chars using the maxlength attribute

**Divyanshi** · Sep 24 '10, 04:16 PM

I tried the following

Code:

function validateDetails()
{
  var TDetails=document.getElementById('<%=txtGDetails.ClientID %>').value;
  if(TDetails=="")
  {
  alert("Please Enter Details");
  document.getElementById('<#=txtGDetails.ClientID').focus();
  return false;
  }
  var count = document.getElementById ('<%=txtGDetails.clientID %>').value.length;
  var txt = document.getElementById('<%=txtGDetails.ClientID %>').value;
  if (count >= 250)
  {
    alert("Details should not exceed 250 characters");
    document.getElementById('<#=txtGDetails.ClientID').focus();
    return false ;
  }
  [B] if (txt.charAt(0)=='')
   {
   alert("First space cannot be blank");
   return false ;
  }[/B]    return true ;
   }

It seems not working, still if i give space as first character, it is not giving the message

And also if the character is more than 250, it has to delete the remaining text

Please help to get this done

Thanks

**RamananKalirajan** · Sep 27 '10, 06:38 AM

Hi,
For your first problem pls find a working sample below

Code:

<html>
<head>
<script type="text/javascript">
function checkSpace(){
  var val = document.getElementById('myText').value;
  if(val.charAt(0)==" "){
    alert("I am found")
  }
}
</script>
</head>
<body>
 <input type="text" name="myText" id="myText" value=" " />
<input type="button" value="Check Space" onclick="checkSpace();"/>
</body>
</html>

For your second problem use the substring()

Thanks and Regards
Ramanan Kalirajan

Check for blank space as first character and trimming textbox i/p

Check for blank space as first character and trimming textbox i/p

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