.btn{
    outline: none;
}

.btn:focus{
    outline: none;
}

#tbresult{
    width: 100%;
    position: relative;
}


.can_l{
    width: 900px;
    border: solid 1px #f2f2f2;
    float: left;
    padding: 30px 0;

    background-position: 0 0,10px 10px!important;
    background-size: 20px 20px!important;
    background-image: linear-gradient(45deg,#eee 25%,transparent 25%,transparent 75%,#eee 75%,#eee 100%),linear-gradient(45deg,#eee 25%,#fff 25%,#fff 75%,#eee 75%,#eee 100%)!important;

}


.can_r{
    width: 260px;
    border: solid 1px #f2f2f2;
    border-left: none;
    float: right;
    overflow: hidden;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
}
#output{
    height: 100%;
    overflow-y: scroll;
}



#canvas{
    margin: 0 auto;
    background-color: #fff;
    position: relative;
}