.poisk{  
position:fixed;  
background-image:-webkit-linear-gradient(bottom,#426BFF,#60A5FF);  
background-image:-moz-linear-gradient(bottom,#426BFF,#60A5FF);  
background-image:-o-linear-gradient(bottom,#426BFF,#60A5FF);  
background-image:linear-gradient(bottom,#426BFF,#60A5FF);  
-webkit-box-shadow:0 0 3px black;  
-moz-box-shadow:0 0 3px black;  
-o-box-shadow:0 0 3px black;  
box-shadow:0 0 3px black;  
border:1px solid #404040;  
left:-200px;  
width:240px;  
height:30px;  
border-radius:3px;  
top:100px;  
color:white;  
text-shadow:0 0 3px black;  
-webkit-transition:all 0.4s ease;  
-moz-transition:all 0.4s ease;  
-o-transition:all 0.4s ease;  
transition:all 0.4s ease;  
padding:3px;  
}  
.poisk:hover{  
left:-3px;  
}  
.poisk #search{  
width:175px;  
position:relative;  
top:3px;  
left:5px;  
-webkit-transition: all 0.4s ease;  
-moz-transition: all 0.4s ease;  
-o-transition: all 0.4s ease;  
transition: all 0.4s ease;  
border-radius:3px;  
border:1px solid #606060;  
height:26px;  
}  
.poisk:hover #search{  
width:230px;  
}  
#search{  
-webkit-transition:all 0.2s ease;  
-moz-transition:all 0.2s ease;  
-o-transition:all 0.2s ease;  
transition:all 0.2s ease;  
}  
#search:focus{  
border:1px solid #404040;  
-webkit-box-shadow:inset 1px 1px 3px #ccc;  
-moz-box-shadow:inset 1px 1px 3px #ccc;  
box-shadow:inset 1px 1px 3px #ccc;  
}  
.poisk:hover #poiskknopka{  
display:none;  
}

<div class="poisk"><form class="poick_os" onsubmit="document.getElementById('sfSbm').disabled=true" method="get" action="/search/"><input id="search" class="poick_pole" type="text" name="q" maxlength="45" value="Поиск..." onclick="if (this.value=='Поиск...'){this.value='';}" id="acpro_inp11" autocomplete="off"><span style="position:absolute;right: 10px;top: 6px;font-family: tahoma, sans-serif;font-size: 14px;font-style: normal;font-variant: normal;font-weight: normal;" id="poiskknopka"><img src="/search1.png"></span></form></div>