.checkbox {
    vertical-align: middle;
    width: 16px;
    height: 16px;
    background: url(../img/checkbox3.png) no-repeat;
    cursor: pointer;
}

@media only screen and (max-width: 768px) {
	.issubmitdiv #btn-cart {
	    margin: 0;
	    margin-top: 20px;	
	}
}