css样式

/* 嵌入式*/

<style type = "text/css">

label {

color:red;

size:30;

}

</style>

/* 外联式*/

<link rel = "stylesheet" type ="text/css" href ="css/main.css">

<label class = "username"/>/* class不唯一 id唯一*/

/* 外联文件*/

#username ,#password{  /* class的统一样式*/

color:red;

size:30;

}

.password{  /* id的样式*/

color:red;

size:30;

}