function jml (obj) {
        if (obj.value =='Enter Your E-mail Address') {
          obj.value = '';
        }
      }

      function showdiv (divobj) {
        document.getElementById(divobj).style.display = 'block';
      }
      function hidediv (divobj) {
        document.getElementById(divobj).style.display = 'none';
      }

      function showmenu (divobj) {
        divobj.style.visibility = 'visible';
      }
      function hidemenu (divobj) {
        divobj.style.visibility = 'hidden';
      }

      image1 = new Image();
      image1.src = "images/menu_imgs/home_over.jpg";
      image2 = new Image();
      image2.src = "images/menu_imgs/auto_glass_over.jpg";
      image3 = new Image();
      image3.src = "images/menu_imgs/res_comm_glass_over.jpg";
      image4 = new Image();
      image4.src = "images/menu_imgs/contact_over.jpg";
      image5 = new Image();
      image5.src = "images/menu_imgs/service_area_over.jpg";
      image6 = new Image();
      image6.src = "images/menu_imgs/free_estimate_over.jpg";

      function formCheck(form) {
        if (form.customer_name.value == "") { alert ("Please fill in the 'Customer Name' field.");  return false; }
        if (form.email_address.value == "") { alert ("Please fill in the 'E-Mail Address' field."); return false; }
        if (form.phone_number.value  == "") { alert ("Please fill in the 'Phone Number' field.");    return false; }
        return true;
      }

      function formCheck2(form) {
        if (form.company_name.value == "")   { alert ("Please fill in the 'Company Name' field.");  return false; }
        if (form.contact_person.value == "") { alert ("Please fill in the 'Contact Person' field."); return false; }
        if (form.email_address.value == "")  { alert ("Please fill in the 'E-Mail Address' field."); return false; }
        if (form.phone_number.value  == "")  { alert ("Please fill in the 'Phone Number' field.");    return false; }
        return true;
      }