.left-blue	{float:left; width:75px; height:30px; display:block; background-image:url(https://images.novatech.co.uk/website2011/pcnb/spec-pages/CONNECTIVITY-BUTTONS/LEFT-BLUE.png); margin:0 0 0 10px; cursor:pointer;}
.right-blue	{float:left; width:75px; height:30px; display:block; background-image:url(https://images.novatech.co.uk/website2011/pcnb/spec-pages/CONNECTIVITY-BUTTONS/RIGHT-BLUE.png); margin:0 0 0 10px; cursor:pointer; }
.left-grey	{float:left; width:75px; height:30px; display:block; background-image:url(https://images.novatech.co.uk/website2011/pcnb/spec-pages/CONNECTIVITY-BUTTONS/LEFT-GREY.png); margin:0 0 0 10px; cursor:pointer; }
.right-grey	{float:left; width:75px; height:30px; display:block; background-image:url(https://images.novatech.co.uk/website2011/pcnb/spec-pages/CONNECTIVITY-BUTTONS/RIGHT-GREY.png); margin:0 0 0 10px; cursor:pointer;  }