function goto(mmain) {
  
  //alert(mmain);
  if (mmain==0) { window.open("index.php?t=123","_self"); }
  if (mmain==10) { window.open("about.php","_self"); }
  if (mmain==20) { window.open("product.php","_self"); } 
  if (mmain==30) { window.open("project_1.php","_self"); } 
  if (mmain==40) { window.open("showcase.php","_self"); } 
  if (mmain==50) { window.open("knowledge.php","_self"); } 
  if (mmain==60) { window.open("lite_care.php","_self"); } 
  if (mmain==70) { window.open("contact.php","_self"); } 
  
  //FOOTER連結
  if (mmain=='service') { window.open("service.php","_self"); }  
  if (mmain=='privacy') { window.open("privacy.php","_self"); }
  if (mmain=='sitemap') { window.open("sitemap.php","_self"); }
  if (mmain=='lutron') { window.open("http://www.lutron.com/Pages/Default.aspx","_blank"); }
  if (mmain=='amx') { window.open("http://www.amx.com/","_blank"); }  
  
  
  //內頁子選單的連結
 
  if (mmain==21) { window.open("project_1.php","_self"); }
  if (mmain==22) { window.open("project_2.php","_self"); }
  if (mmain==23) { window.open("project_3.php","_self"); }
  if (mmain==24) { window.open("project_4.php","_self"); }
  if (mmain==25) { window.open("project_5.php","_self"); }
  if (mmain==26) { window.open("project_6.php","_self"); }
  if (mmain==27) { window.open("project_7.php","_self"); }
  if (mmain==28) { window.open("project_8.php","_self"); }
  if (mmain==29) { window.open("project_9.php","_self"); }
  if (mmain==210) { window.open("project_10.php","_self"); }
  
  //首頁圖片連結
  if (mmain=='project0') { window.open("project_1.php","_self"); }  
  if (mmain=='project1') { window.open("project_1.php","_self"); }
  if (mmain=='project2') { window.open("project_1.php","_self"); }
  if (mmain=='project3') { window.open("project_1.php","_self"); }
  if (mmain=='project4') { window.open("project_1.php","_self"); } 
  
   
}