Button CSS from Ext 3.1
Code:
.x-btn-tl, .x-btn-tr, .x-btn-tc, .x-btn-ml, .x-btn-mr, .x-btn-mc, .x-btn-bl, .x-btn-br, .x-btn-bc{
background-image:url(../images/default/button/btn.gif);
}
.x-btn-tl{
width:3px;
height:3px;
background:no-repeat 0 0;
}
.x-btn-tr{
width:3px;
height:3px;
background:no-repeat -3px 0;
}
.x-btn-tc{
height:3px;
background:repeat-x 0 -6px;
}
.x-btn-ml{
width:3px;
background:no-repeat 0 -24px;
}
.x-btn-mr{
width:3px;
background:no-repeat -3px -24px;
}
.x-btn-mc{
background:repeat-x 0 -1096px;
vertical-align: middle;
text-align:center;
padding:0 5px;
cursor:pointer;
white-space:nowrap;
}
/* Fixes an issue with the button height */
.ext-strict .ext-ie6 .x-btn-mc, .ext-strict .ext-ie7 .x-btn-mc {
height: 100%;
}
.x-btn-bl{
width:3px;
height:3px;
background:no-repeat 0 -3px;
}
.x-btn-br{
width:3px;
height:3px;
background:no-repeat -3px -3px;
}
.x-btn-bc{
height:3px;
background:repeat-x 0 -15px;
}
.x-btn-over .x-btn-tl{
background-position: -6px 0;
}
.x-btn-over .x-btn-tr{
background-position: -9px 0;
}
.x-btn-over .x-btn-tc{
background-position: 0 -9px;
}
.x-btn-over .x-btn-ml{
background-position: -6px -24px;
}
.x-btn-over .x-btn-mr{
background-position: -9px -24px;
}
.x-btn-over .x-btn-mc{
background-position: 0 -2168px;
}
.x-btn-over .x-btn-bl{
background-position: -6px -3px;
}
.x-btn-over .x-btn-br{
background-position: -9px -3px;
}
.x-btn-over .x-btn-bc{
background-position: 0 -18px;
}
I have done custom buttons but for what i'm using it was a very basic sprite for touchscreen like square buttons. 
Am making a new theme for the project I am working on and hope to have it free to use for this year. Depends on the bosses lol.