Convert LowerCase To UpperCase While Typing

I post a little function which will help you to convert lowerCase to UpperCase while you are typing.


Code:

<script language="javascript" type="text/javascript">
function pulsar(e,obj) {
tecla = (document.all) ? e.keyCode : e.which;
//alert(tecla);
if (tecla!="8" && tecla!="0"){
obj.value += String.fromCharCode(tecla).toUpperCase();
return false;
}else{
return true;
}
}
</script>

<input type="text" onkeypress="return pulsar(event,this)" />

If you could help me to improve this function your advice is very welcome.....