Hello all,
I have a textbox, in which i have to perform the following validations
1)first character cannot be blank space
2)characters should not exceed 100
3)if exceeded 100, it should trim the i/p to 100 characters
How can i do it?
Please give your valuable suggestions
Thank you all
4  15314 
Hi Divyanshi,
get the textbox content in a variable and check with the two properties as shown below
Ex: - 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 8,658
Recognized Expert Moderator Expert
regarding 2), limit the textbox to 100 chars using the maxlength attribute
I tried the following - 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 ;
-
}
-
if (txt.charAt(0)=='')
-
{
-
alert("First space cannot be blank");
-
return false ;
-
} 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
Hi,
For your first problem pls find a working sample below - <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
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