.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>