ie7 href tag error

I used href attribute in a tag for code data .

chrome , ie 11, 10, 9, 8 has no problem

but ie 7 is not support the regular href attribute  

ie7 href defult value has always append the domain url

<a href = "01"></a>
("a").attr("href")  = > http://localhost:8080/01  

i got the solution data-href tag does not append the url