@font-face {
font-family: 'Arial';
src: 
url('font1.woff') format('woff'),
url('font1.ttf') format('truetype');
}
.f1{
font-family:'Arial';
line-height:1em;
}
@font-face {
font-family: 'Arial Bold';
src: 
url('font2.woff') format('woff'),
url('font2.ttf') format('truetype');
font-weight:bold;
}
.f2{
font-family:'Arial Bold';
line-height:1em;
}