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<!DOCTYPE html> <html> <head> <title>Xem ví dụ</title> <style type="text/css"> #a{ width:200px; height:200px; background-color:green; position:absolute; z-index:initial; } #b{ width:200px; height:200px; background-color:blue; position:absolute; top:100px; left:100px; } </style> </head> <body> <div id="a"></div> <div id="b"></div> </body> </html>
<!DOCTYPE html> <html> <head> <title>Xem ví dụ</title> <style type="text/css"> #a{ width:200px; height:200px; background-color:green; position:absolute; z-index:initial; } #b{ width:200px; height:200px; background-color:blue; position:absolute; top:100px; left:100px; } </style> </head> <body> <div id="a"></div> <div id="b"></div> </body> </html>