居中两个并排div

Question

我有点生锈与CSS，我卡住了这一点，我想实现的是有两个div并排与图像重叠的两个顶角，这我有多少事（希望正确），有什么我坚持做的是试图中心的两个并排侧的div我现在不能做没有打破它

任何帮助将是巨大的，谢谢

<style> 
#wrapper { 
    margin:0 auto; 
    height:auto; 
    overflow: hidden; /* add this to contain floated children */ 
} 
#first { 
    width: 300px; 
    float:left; /* add this */ 
    color:#FFF; 
    padding:0 5px 5px 5px; 
    background: url(view.image?id=598) 0 100% #fcb033 no-repeat; 
} 
#second { 
    width: 300px; 
    float: left; 
    padding:0 5px 5px 5px; 
    color:#FFF; 
    background: url(view.image?id=595) 100% 100% #c1d72e no-repeat; 

} 
    #overlayleft{ 
     position:absolute; 
     top:-40px; 
     left:-30px; 
    } 

    #overlayright{ 
     position:absolute; 
     top:-40px; 
     left:570px; 
    } 
    </style> 


    <div id"wrapper"> 
    <div id="first"><div id="overlayleft"><img alt="Dr Sayer" height="94" src="view.image?Id=592" width="93" /></div><h1 style="text-align:right">Dr John Sayer</h1><p>Cystic kidney diseases, such as polycystic kidney 
    disease (PKD), are responsible for ten per cent of 
    patients requiring dialysis and transplantation in 
    the UK. As with most cystic kidney diseases, PKD 
    is a genetic condition which causes fluid-filled 
    sacks to develop on the interior and exterior of 
    the kidneys. These sacks gradually replace normal 
    kidney tissue, enlarging the organs and reducing 
    their ability to function – eventually causing them 
    to fail altogether. A recently discovered gene, 
    involved in the onset of cystic kidney diseases, 
    has provided a basis for the work of Dr John Sayer. 
    Dr Sayer is studying this specific gene closely and 
    hopes not only to improve our understanding of 
    the molecules which cause cystic kidney diseases, 
    but also test potential new drug treatments aimed 
    at preventing the formation of cysts.</p></div> 

    <div id="second"><div id="overlayright"><img alt="Donate" height="94" src="view.image?Id=592" width="93" /></div><h1>Carol Norbury</h1> 
    <p>Carol Norbury’s family has a prolonged history of polycystic 
    kidney disease. Her husband, John, was diagnosed with the condition in 1996, before 
    going on to suffer complete renal 
    failure in late 2004. Luckily, Carol 
    was found to be a suitable organ 
    donor. However, since then, each 
    of Carol and John’s three children 
    has been diagnosed with 
    the condition.</p></div> 
    <div class"clear"></div> 
    </div> 

Answer 1

您必须在“margin：0 auto;”的包装器上指定宽度上班。

，你就错过了等号在包装标识