Hi joakim, look closely at the 'button' on that page (hit Ctrl+U to see page source code or use right-click and choose Inspect Element in Google Chrome or Opera browser) and you'll notice that it's not a button at all. It's still a link but styled to look like a button:
<div class="call-to-action">
<a href="#contact_form_pop" class="blue button fancybox-inline">Solicite una cotización</a>
</div>
Styled with these CSS rules:
.call-to-action {
text-align: center;
}
.call-to-action a.button {
font-size: 24px;
padding: 15px 35px;
}
a.button:hover, input[type='reset']:hover, input[type='button']:hover, input[type='submit']:hover {
-moz-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
-webkit-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
background-color: #ffffff;
background-image: -webkit-gradient(linear, left top, left bottom, from(#ffffff), to(#f1f1f1));
background-image: -webkit-linear-gradient(top, #ffffff, #f1f1f1);
background-image: -moz-linear-gradient(top, #ffffff, #f1f1f1);
background-image: -ms-linear-gradient(top, #ffffff, #f1f1f1);
background-image: -o-linear-gradient(top, #ffffff, #f1f1f1);
background-image: linear-gradient(top, #ffffff, #f1f1f1);
border: 1px solid #dddddd;
box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
color: #333333;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#ffffff, endColorstr=#f1f1f1);
}
a.button:active, input[type='reset']:active, input[type='button']:active, input[type='submit']:active {
-moz-box-shadow: 0 1px 0 #ffffff, inset 0 1px 1px rgba(0, 0, 0, 0.1);
-webkit-box-shadow: 0 1px 0 #ffffff, inset 0 1px 1px rgba(0, 0, 0, 0.1);
background-color: #f9f9f9;
background-image: -webkit-gradient(linear, left top, left bottom, from(#f9f9f9), to(#f1f1f1));
background-image: -webkit-linear-gradient(top, #f9f9f9, #f1f1f1);
background-image: -moz-linear-gradient(top, #f9f9f9, #f1f1f1);
background-image: -ms-linear-gradient(top, #f9f9f9, #f1f1f1);
background-image: -o-linear-gradient(top, #f9f9f9, #f1f1f1);
background-image: linear-gradient(top, #f9f9f9, #f1f1f1);
box-shadow: 0 1px 0 #ffffff, inset 0 1px 1px rgba(0, 0, 0, 0.1);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#f9f9f9, endColorstr=#f1f1f1);
}
a.blue {
background-color: #1874cd;
background-image: -webkit-gradient(linear, left top, left bottom, from(#4f9eea), to(#1874cd));
background-image: -webkit-linear-gradient(top, #4f9eea, #1874cd);
background-image: -moz-linear-gradient(top, #4f9eea, #1874cd);
background-image: -ms-linear-gradient(top, #4f9eea, #1874cd);
background-image: -o-linear-gradient(top, #4f9eea, #1874cd);
background-image: linear-gradient(top, #4f9eea, #1874cd);
border: 1px solid #115290;
color: #ffffff;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#4f9eea, endColorstr=#1874cd);
text-shadow: 0 -1px 0 #115290;
}
a.blue:hover {
background-color: #7db7f0;
background-image: -webkit-gradient(linear, left top, left bottom, from(#7db7f0), to(#1874cd));
background-image: -webkit-linear-gradient(top, #7db7f0, #1874cd);
background-image: -moz-linear-gradient(top, #7db7f0, #1874cd);
background-image: -ms-linear-gradient(top, #7db7f0, #1874cd);
background-image: -o-linear-gradient(top, #7db7f0, #1874cd);
background-image: linear-gradient(top, #7db7f0, #1874cd);
border: 1px solid #115290;
color: #ffffff;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#7db7f0, endColorstr=#1874cd);
text-shadow: 0 -1px 0 #115290;
}
a.button, input[type='reset'], input[type='button'], input[type='submit'] {
-moz-border-radius: 2px;
-moz-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
-webkit-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
-webkit-border-radius: 2px;
background-color: #f9f9f9;
background-image: -webkit-gradient(linear, left top, left bottom, from(#f9f9f9), to(#f1f1f1));
background-image: -webkit-linear-gradient(top, #f9f9f9, #f1f1f1);
background-image: -moz-linear-gradient(top, #f9f9f9, #f1f1f1);
background-image: -ms-linear-gradient(top, #f9f9f9, #f1f1f1);
background-image: -o-linear-gradient(top, #f9f9f9, #f1f1f1);
background-image: linear-gradient(top, #f9f9f9, #f1f1f1);
box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
border: 1px solid #dddddd;
border-radius: 2px;
color: #333333;
cursor: pointer;
display: inline-block;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#f9f9f9, endColorstr=#f1f1f1);
font-size: 14px;
font-weight: 700;
line-height: 20px;
margin: 0;
padding: 4px 10px;
text-decoration: none;
text-shadow: 0 1px 0 #ffffff;
vertical-align: middle;
white-space: nowrap;
}
Hope that helps you on your way :)