.istt-button {
    width: 40px;
    height: 40px;

    position: fixed;
    bottom: 10px;
    right: 50%;
    display: none;
    font-size: large;
    font-weight: bold;
  	 /*border:3px solid #111;*/
    text-align: center;
    border-radius: 50%;
    background-color: #fff;
    box-shadow: #111 0px 0px 3px 1px;
  	
  	animation:bounce 2s infinite;
   -webkit-animation:bounce 2s infinite;
   -moz-animation:bounce 2s infinite;
   -o-animation:bounce 2s infinite;
   z-index: 99999;
  
}

.istt-button:hover,
.istt-arrow-up:hover {
	cursor: pointer;
}

.istt-arrow-up {
  width:0; 
  height: 0; 
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  position: fixed;
  border-bottom: 7px solid black;
  right: 35%;
  top: 30%;
}





/*support in IE 10+, Fx 29+ */
@keyframes bounce
 {
  0%       { 

  	bottom:5px; 
  		

  }
  25%, 75% {
   bottom:15px; 
   -webkit-transform: rotate(360deg);
}
  50%      { 
  	bottom:100px; 
  		
  	  
  }
  100%     {
  	bottom:0;
  	
  }
}


/*support in Safari 4+*/
@-webkit-keyframes bounce
 {
  0%       { 

  	bottom:5px; 
  		

  }
  25%, 75% {
   bottom:15px; 
   -webkit-transform: rotate(360deg);
}
  50%      { 
  	bottom:100px; 
  		
  	  
  }
  100%     {
  	bottom:0;
  	
  }
}


/*support in Fx 5+*/
@-moz-keyframes bounce
 {
  0%       { 

  	bottom:5px; 
  		

  }
  25%, 75% {
   bottom:15px; 
   -webkit-transform: rotate(360deg);
}
  50%      { 
  	bottom:100px; 
  		
  	  
  }
  100%     {
  	bottom:0;
  	
  }
}


/*support in  Opera 12+*/
@-o-keyframes bounce
 {
  0%       { 

  	bottom:5px; 
  		

  }
  25%, 75% {
   bottom:15px; 
   -webkit-transform: rotate(360deg);
}
  50%      { 
  	bottom:100px; 
  		
  	  
  }
  100%     {
  	bottom:0;
  	
  }
}