[attr|="value"]

E[lang|="en"] Matches any E element whose "lang" attribute has a hyphen-separated list of values beginning (from the left) with "en".

[class|="ui"] {border-color:red}

<input type="text" name="my_input" id="my_input" />

<input type="text" name="my-input" id="my-input" />

<input type="text" id="begin_stand" name="begin_stand"  value="10" size="8" maxlength="8">

beginst = document.getElementById('begin_stand').value;
Error : object doesnt support this etc.

<input type="text" id="beginstand" name="beginstand"  value="10" size="8" maxlength="8">

beginst = document.getElementById('beginstand').value;

<input type="text" id="beginstand" name="beginstand"  value="10" size="8" maxlength="8">
beginstand = document.getElementById('beginstand').value;