Script Method:
<input type="text" id="ele" onkeyup="this.value=this.value.toUpperCase()" >
CSS Method:
Add style "text-transform:uppercase"
<input type="text" id="ele" style='text-transform:uppercase' >
<input type="text" id="ele" onkeyup="this.value=this.value.toUpperCase()" >
CSS Method:
Add style "text-transform:uppercase"
<input type="text" id="ele" style='text-transform:uppercase' >