Chỉnh chiều cao của fieldset giống nhau
Using simple jQuery code you can achieve the equal column height DEMO HTML <div id = "container" > <fieldset class = "box" > <legend> Title </legend> CONTENT <br/> test </fieldset> <fieldset class = "box" > <legend> Title </legend> CONTENT </fieldset> <fieldset class = "box" > <legend> Title </legend> CONTENT </fieldset> </div> CSS . box { float : left ; width : 25 %; } jQuery $ ( function () { var H = 0 ; $ ( "div" ). each ( function ( i ) { var h = $ ( ".box" ). eq ( i ). height (); if ( h > H ) H = h ; }); $ ( ".box" ). height ( H ); });