where i can find $form.phone.$blockId.phone.html

[henro]

hi all
i tried to set first character in text boxt's phone by javascript but didnot solve
so,
i want to set fisrt character by html textboxt's phone in contact.tpl , but i see this code
 
<td>{$form.phone.$blockId.phone.html}&nbsp;&nbsp;{ts}ext.{/ts}&nbsp;{$form.phone.$blockId.phone_ext.html|crmAddClass:four}&nbsp;</td>


where can i find form.phone.$blockId.phone.html file