محرك بحث داخل الصفحة

<script language="JavaScript"><br /><br /><br />var NS4 = (document.layers); // Which browser?<br />var IE4 = (document.all);<br /><br />var win = window; // window to search.<br />var n= 0;<br /><br />function findInPage(str) {<br /><br /> var txt, i, found;<br /><br /> if (str == "")<br /> return false;<br /><br /> // Find next occurance of the given string on the page, wrap around to the<br /> // start of the page if necessary.<br /><br /> if (NS4) {<br /><br /> // Look for match starting at the current point. If not found, rewind<br /> // back to the first match.<br /><br /> if (!win.find(str))<br />while(win.find(str, false, true))<br /> n++;<br /> else<br />n++;<br /><br /> // If not found in either direction, give message.<br /><br /> if (n == 0)<br />alert("Not found.");<br /> }<br /><br /> if (IE4) {<br /> txt = win.document.body.createTextRange();<br /><br /> // Find the nth match from the top of the page.<br /><br /> for (i = 0; i <= n && (found = txt.findText(str)) != false; i++) {<br />txt.moveStart("character", 1);<br />txt.moveEnd("textedit");<br /> }<br /><br /> // If found, mark it and scroll it into view.<br /><br /> if (found) {<br />txt.moveStart("character", -1);<br />txt.findText(str);<br />txt.select();<br />txt.scrollIntoView();<br />n++;<br /> }<br /><br /> // Otherwise, start over at the top of the page and find first match.<br /><br /> else {<br />if (n > 0) {<br /> n = 0;<br /> findInPage(str);<br />}<br /><br />// Not found anywhere, give message.<br /><br />else<br /> alert("Not found.");<br /> }<br /> }<br /><br /> return false;<br />}<br /><br /></script><br /><br /><form name="search" onSubmit="return findInPage(this.string.value);"><br /><font size=3><input name="string" type="text" size=15 onChange="n = 0;"></font><br /><input type="submit" value="Find"><br /></form>