页面内查找_javascript技巧

2020-11-27 来源：尚车旅游网

你可以输入'脚本'查查看

查找页面中的字符 
<script language="JavaScript">

var NS4 = (document.layers); // Which browser? 
var IE4 = (document.all);

var win = window; // window to search. 
var n = 0;

function findInPage(str) {

var txt, i, found;

if (str == "") 
 return false;

// Find next occurance of the given string on the page, wrap around to the 
 // start of the page if necessary.

if (NS4) {

// Look for match starting at the current point. If not found, rewind 
 // back to the first match.

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

// If not found in either direction, give message.

if (n == 0) 
 alert("Not found."); 
 }

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

// Find the nth match from the top of the page.

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

// If found, mark it and scroll it into view.

if (found) { 
 txt.moveStart("character", -1); 
 txt.findText(str); 
 txt.select(); 
 txt.scrollIntoView(); 
 n++; 
 }

// Otherwise, start over at the top of the page and find first match.

else { 
 if (n > 0) { 
 n = 0; 
 findInPage(str); 
 }

// Not found anywhere, give message.

else 
 alert("Not found."); 
 } 
 }

return false; 
}

</ script>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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