function a1(){  
window.open("index.asp","_self")   
}
function a2(){  
window.open("products.asp","_self")   
} 
function a3(){   
window.open("products_tj.asp","_self")   
}   
function a4(){   
window.open("news.asp?classid=66","_self")   
}   
function a5(){ 
window.open("about.asp?id=2","_self")   
}   
function a6(){ 
window.open("about.asp?id=15","_self")   
}   
function a7(){   
window.open("guest.asp","_self")   
}     
function a8(){  
window.open("about.asp?id=3","_self")   
}