function hideX()
{
	document.body.style.overflowX = "hidden";
}
function chang_img1(img_name){
   document.slide.src = img_name;
}
function chang_img2(img_name){
   document.slide2.src = img_name;
}

function OpenWin1(){
    
     win=window.open("book.html","book","width=860,height=680,status=no,scrollbars=no,directories=no,menubar=no,resizable=no,toolbar=no");
}