javascript - jQuery selector: Firefox recognize but IE not -

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this element custom attribute:

<input type="radio" status="b" name="opt_parent"/>


my script:
alert($(this).attr("status"));
alert($(this).attr("test"));

output:
firefox 3.0.10 --> "b" , "undefined"
ie 8.0.7600.16385 --> "true" , "undefined"

my observation:
ie return option button "checked state" true/false not custom attribute value. ie can detect whether custom attribute exist.

my question: how custom attribute value in ie?

this workaround ie, using outerhtml

var status =     ($(this)     .get(0)     .outerhtml     .replace(/^.+?\bstatus\s*=\s*(?:['"])(\w+).*$/,         function(tag, valueattr) {           return valueattr;        })) || '';

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