z-indexing floating divs
问题 I have two divs float:left. I z-index the first div to be above, but it doesn't work. Is this because floated elements are not positioned? <html> <style> #wrap{ background:#666; } #menu, #thumbs{ float:left; } #menu{ background:#06C; z-index:10; } #thumbs{ background:#0CF; margin-left:-20px; } </style> </head> <body> <div id="wrap"> <div id="menu"> <p>menu</p> </div> <div id="thumbs"> <p>thumbs</p> </div> </div> </body> </html> 回答1: You need to set the position property. Adding position