function readdata_top(){
m_1=new Image(450,450);
m_1.src="main_1.gif";
m_2=new Image(450,450);
m_2.src="main_2.gif";
m_3=new Image(450,450);
m_3.src="main_3.gif";
s_1=new Image(200,200);
s_1.src="sw_1.gif";
s_2=new Image(200,200);
s_2.src="sw_2.gif";
s_3=new Image(200,200);
s_3.src="sw_3.gif";
s_4=new Image(200,200);
s_4.src="sw_4.gif";
blog1_b=new Image(200,60);
blog1_b.src="blog1_b.gif";
blog2_b=new Image(200,60);
blog2_b.src="blog2_b.gif";
old_b=new Image(200,40);
old_b.src="old_b.gif";
mobile_b=new Image(200,150);
mobile_b.src="mobile_b.gif";
vs_mic_b=new Image(25,25);
vs_mic_b.src="vs_mic_b.gif";
}
function sw_off(){
document.switch_img.src="sw_0.gif";
document.main_img.src="main_0.gif";
}
function sw_1_on(){
document.switch_img.src=s_1.src;
document.main_img.src=m_1.src;
}
function sw_2_on(){
document.switch_img.src=s_2.src;
document.main_img.src=m_2.src;
}
function sw_3_on(){
document.switch_img.src=s_3.src;
document.main_img.src=m_3.src;
}
function sw_4_on(){
document.switch_img.src=s_4.src;
}
function sw2_off(){
document.switch_img.src="sw_0.gif";
}
function sw2_1_on(){
document.switch_img.src=s_1.src;
}
function sw2_2_on(){
document.switch_img.src=s_2.src;
}
function sw2_3_on(){
document.switch_img.src=s_3.src;
}
function m_on(x){
document.images[x].src=eval(x+"_b.src");
}
function m_off(x){
document.images[x].src=x+"_a.gif";
}
function vs_on(x){
document.images[x].src=eval("vs_mic_b.src");
}
function vs_off(x){
document.images[x].src="vs_mic_a.gif";
}