function tabContent(tcID) {
        if(tcID == "tab1") {
               document.getElementById("tab1").setAttribute("class",  "contacttab11");
               document.getElementById("tab2").setAttribute("class",  "contacttab21");
	       document.getElementById("contactslider").style.display = 'block';
	       document.getElementById("servicesslider").style.display = 'none';
               document.getElementById("tab1").className = "contacttab11";
               document.getElementById("tab2").className = "contacttab21";
          }else if(tcID == "tab2") {
               document.getElementById("tab1").setAttribute("class",  "contacttab12");
               document.getElementById("tab2").setAttribute("class",  "contacttab22");
	       document.getElementById("contactslider").style.display = 'none';
	       document.getElementById("servicesslider").style.display = 'block';
               document.getElementById("tab1").className = "contacttab12";
               document.getElementById("tab2").className = "contacttab22";
          }else if(tcID == "promo") {
	       window.parent.document.getElementById("promo").style.display = 'block';             
	       window.parent.document.getElementById("noopac").style.display = 'block';
               window.parent.document.getElementById("body").style.overflow = 'hidden';
               window.parent.document.getElementById("html").style.overflow = 'hidden';
          }else if(tcID == "close") {
	       window.parent.document.getElementById("promo").style.display = 'none';             
	       window.parent.document.getElementById("noopac").style.display = 'none';
               window.parent.document.getElementById("body").style.overflow = 'auto';
               window.parent.document.getElementById("html").style.overflow = 'auto';
          }
  }