最全的UI设计实训报告
<style type="text/css">
*{
margin:0 auto; padding:0;} width:1000px; height:40px; background-color:#999;} .m2{ width:250px; background-color:#33C; text-align:center; line-height:40px; float:left;} .m3 { width:250px; background-color:#0C0; text-align:center; line-height:40px; float:right;} .m4 { width:250px; background-color:#309; text-align:center; line-height:40px; } a{ display:block; text-decoration:none; } width:250px; .m1{ a:hover{