.aspmenunavi{  
  margin: 0;  
  padding: 0;  
  width: 960px;  
}
  
.aspmenunavi ul{  
  list-style-type: none;  
  margin: 0;  
  padding: 0;  
}  
  
.aspmenunavi li{  
  width: 25%;  
  margin: 0.5em 2px;
  padding: 0;  
}  
  
.aspmenunavi a{  
  display:block;  
  padding: 2px;  
  width: 100%;
  background-color: #e0ffcf;
  color: #00664d;
  
}  
  
.aspmenunavi a:hover{  
  background-color: #00664d;
  color: white;  
}  

.clear {
    clear:both; /*floatの解除、ここがポイント*/
}