<html>
<head>
<style>
div
{
width:100px;
height:50px;
background:red;
color:white;
font-weight:bold;
transition:width 2s;
transition:width 2s; /* Safari */
}
#div1 {transition-timing-function: linear;}
#div2 {transition-timing-function: ease;}
#div3 {transition-timing-function: ease-in;}
#div4 {transition-timing-function: ease-out;}
#div5 {transition-timing-function: ease-in-out;}
/* Safari */