how to set focus to the same txtbox after validation by onblur which calls a function

[vigneshwarie]

my textbox and the function in javascript

<td><input type="text" name="username" id="username" onblur="validate('text','username','user')">
<div id="user"></div></td>

<script type="javascript">
function validate(type,fieldname,divid)
{
var txt_value=document.getElementById(fieldname).value;
if(type=='text')
{
   if(txt_value==""||txt_value==null)
   {
    document.getElementById(divid).innerHTML="<span   style='color:red;'>Mandatory!</span>"
    document.getElementById(fieldname).focus();
    return false;
   }
}
}
</script>

Soon after the textbox loses the focus the error message should be displayed and the focus has to be set back to the textbox. Likewise i'm doing for different txtbox on various condition.

Here the error message is displayed but the focus is not set to the textbox again moving to the textbox which I clicked. It should not allow me to move to the next field rather it should display the error message and focus on the same textbox.

Help me.
Thanks,
vigneshwarie.

[Dormilich]

the focus() doesn’t work, because you’ve not yet left the <input> element.

comments:
- line 4: wrong MIME
- line 7/8: you don’t need to pass the input id and input type, as this is available through this
- line 10: the input’s value is always a string, no need to test for null

<input type="text" name="username" id="username" onblur="validate(this,'user')">
<div id="user"></div>
 
<script type="text/javascript">
function validate(elem,divid)
{
   if(elem.type !== 'text') {
      return true;
   }
   if(elem.value.length === 0) {
      document.getElementById(divid).innerHTML = "<span style='color:red;'>Mandatory!</span>";
      return false;
   }
   return true;
}
</script>