javascript - Compare strings that have white space on the left side -

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hello comparing 2 strings.. how identify both deference/same if 1 having white space like,

a=ashus<br> b=ashus     (second 1 white space on left side)

now want check whether both values same or not.(according code, both different)

if($qopt1a==$qopt2a or $qopt1a==$qopt3a or $qopt1a==$qopt4a or $qopt2a==$qopt3a or $qopt2a==$qopt4a or $qopt4a==$qopt3a){     echo "<script>             alert('option should not same');           </script>"; }

what need trim(). it'll remove white space on both sides, if want remove white space in left side can use ltrim()


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