function href(){  
     if(document.getElementById("aa").value == "menu1"){  
		window.open("http://www.hi.co.kr/","_blank"); 
     }else if(document.getElementById("aa").value == "menu2"){  
		window.open("http://www.hicardirect.co.kr/index.html","_blank"); 
    }else if(document.getElementById("aa").value == "menu3"){         
		window.open("http://www.hi-cs.co.kr/","_blank");
     }else if(document.getElementById("aa").value == "menu4"){         
		window.open("http://www.hicar.co.kr/","_blank");
     } else if(document.getElementById("aa").value == "menu5"){         
		window.open("http://www.hdcnr.co.kr/","_blank");
     } else if(document.getElementById("aa").value == "menu6"){         
		window.open("http://www.hdfund.co.kr/","_blank");
     }  else if(document.getElementById("aa").value == "menu7"){         
		window.open("http://www.hicapital.co.kr/","_blank");
     }    
  }