// JScript 文件
function doZoom(size){ 
     document.getElementById('zoom').style.fontSize=size+'px' 
} 


var DOM = (document.getElementById) ? 1 : 0; 
var NS4 = (document.layers) ? 1 : 0; 
var IE4 = 0; 
if (document.all) 
{ 
     IE4 = 1; 
     DOM = 0; 
} 

var win = window;    
var n    = 0; 

function findIt() { 
     if (document.getElementById("searchstr").value != "") 
         findInPage(document.getElementById("searchstr").value); 
} 


function findInPage(str) { 
var txt, i, found; 

if (str == "") 
     return false; 

if (DOM) 
{ 
     win.find(str, false, true); 
     return true; 
} 

if (NS4) { 
     if (!win.find(str)) 
         while(win.find(str, false, true)) 
             n++; 
     else 
         n++; 

     if (n == 0) 
         alert("未找到指定内容."); 
} 

if (IE4) { 
     txt = win.document.body.createTextRange(); 

     for (i = 0; i <= n && (found = txt.findText(str)) != false; i++) { 
         txt.moveStart("character", 1); 
         txt.moveEnd("textedit"); 
     } 

if (found) { 
     txt.moveStart("character", -1); 
     txt.findText(str); 
     txt.select(); 
     txt.scrollIntoView(); 
     n++; 
} 
else { 
     if (n > 0) { 
         n = 0; 
         findInPage(str); 
     } 
     else 
         alert("未找到指定内容."); 
     } 
} 

return false; 
}