You can change the case of the text entered in a custom field by writing this code in HTML Tag box in the custom field settings.
'''To convert entered text to Uppercase
<pre>
onChange="javascript:this.value=this.value.toUpperCase();"
</pre>
'''To convert entered text to lowercase
<pre>
onChange="javascript:this.value=this.value.toLowerCase();"
</pre>
This The code will change the case gets executed as soon as the user enters a value and clicks anywhere outside the field (even without having to hit SAVE).
[[Category:Custom Fields]][[Category:JavaScript Examples]]