.x-form-tscheckbox {
	height: 13px;
	width: 13px;
	background: url('../images/tricheckbox.gif') no-repeat 0 0;
	vertical-align: bottom;
}
.x-checkbox-checked .x-form-tscheckbox {
	background-position:0 -13px;	
}
.x-checkbox-undef .x-form-tscheckbox {
	background-position:0 -26px;	
}
.x-item-disabled .x-form-tscheckbox {
	background-position:-39px 0;	
}
.x-form-check-over .x-form-tscheckbox {
	background-position: -13px 0;
}
.x-form-check-down .x-form-tscheckbox {
	background-position:-26px 0;	
}
.x-checkbox-checked .x-form-check-over .x-form-tscheckbox {
	background-position:-13px -13px;
}
.x-checkbox-checked .x-form-check-down .x-form-tscheckbox {
	background-position:-26px -13px;	
}
.x-checkbox-checked.x-item-disabled .x-form-tscheckbox {
	background-position:-39px -13px;
}
.x-checkbox-undef .x-form-check-over .x-form-tscheckbox {
	background-position:-13px -26px;
}
.x-checkbox-undef .x-form-check-down .x-form-tscheckbox {
	background-position:-26px -26px;	
}
.x-checkbox-undef.x-item-disabled .x-form-tscheckbox {
	background-position:-39px -26px;
}