The easiest way to constrain an HTML input box to uppercase is to use the
STYLE attribute inside the
INPUT tag.
Suppose you have the following code:
<input type="text" name="big" style="text-transform:uppercase;">
When you type
usd, it will appear on screen as
USD, but it will be submitted to the server as
usd, since
STYLE only affects the appearance, not the original data.
Here's the workaround:
<input type="text" name="realbig" style="text-transform:uppercase;" on keyup="javascript:this.value=this.value.toUpperCase();">
This raises another question: why not remove
STYLE and just use the JavaScript? The answer is: You can, but users will see the characters "flash" from lower to upper case as they type, which is irritating."
