css 背景漸層

<style type="text/css">
<!--
body {
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
}

#leftmenu{
margin: 3px;
padding:4px ;
background: -webkit-linear-gradient(left,#b1d8f5,#ffffff);  //背景漸層
background: -o-linear-gradient(right,#b1d8f5,#ffffff);
background: -moz-linear-gradient(right,#b1d8f5,#ffffff);
background: linear-gradient(to right,#b1d8f5,#ffffff);
box-shadow:2px 2px 4px 1px rgba(20%,20%,40%,0.5);  //陰影
}
-->
</style>



          <div  id="leftmenu" >測試</div>