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实现textarea内字符串选择查询替换功能

来源：互联网作者： rocket 2008-03-20/12:03

软件频道

编程学院

Javascript

技巧应用

正文

----------自动替换版----------

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<SCRIPT LANGUAGE="JavaScript">
var staus ;
var oRange;
var objTimer;
var objTimer1;
var objTimer2;
var sBookMark;
<!--
function selectall(objAll,OBJSingle){
alert(objAll.checked);
for (var i=0;i<OBJSingle.length;i++){
if (objAll.checked){
for( objs in OBJSingle){
alert(objs.value);
objs.checked=true;
}
}
else{
OBJSingle.checked=false;
}
}
}

function fnSearch() {
fm1.txtarea1.focus();
oRange = fm1.txtarea1.createTextRange();
searchtxt(1);
}

function searchtxt(n){
var v1;
var v2;
var txtr;
var blnS;

window.clearInterval(objTimer1);
window.clearInterval(objTimer2);

v1 = fm1.txtarea1.value;
v2 = fm1.txtarea2.value;
v3 = fm1.txtarea3.value;

if( n == 1) {
if (oRange != null) {
oRange.findText(v2);
if (oRange.findText(v2) == true){
//sBookMark = oRange.getBookmark();
oRange.select();
oRange.scrollIntoView();
objTimer2 = window.setInterval("searchtxt(2)",1000);
}
else{
objTimer = window.setInterval("searchtxt(3)",1000);
}
}
staus = 2 ;
}
else if(n==2) {
oRange.text = v3;
staus = 1;
objTimer1 = window.setInterval("searchtxt(1)",1000);
}
else if(n==3) {
staus = 3 ;
window.clearInterval(objTimer);
window.clearInterval(objTimer1);
window.clearInterval(objTimer2);
}
}
//-->
</SCRIPT>
</HEAD>
<BODY>
<FORM METHOD=POST name="fm1">
<TEXTAREA NAME="txtarea1" ROWS="20" COLS="50">
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
</TEXTAREA>
<TEXTAREA NAME="txtarea2" ROWS="20" COLS="50"> will be </TEXTAREA>
<TEXTAREA NAME="txtarea3" ROWS="20" COLS="50"> has been </TEXTAREA>
<input type="button" value="search" onclick="fnSearch()">
</FORM>

</BODY>
</HTML>

--------------------------------手动改进版----------------------------------------

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<SCRIPT LANGUAGE="JavaScript">
var oRange;     // save the current textrange
var intCount = 0;   // this pos of current textrange in the total count
var intTotalCount = 0; // total count
<!--
//==============================================
//function : fnSearch()
//comment : Search the text
//param    : none
//return   : none
//author   : Fantiny
//Date     : 10/21/2005
//==============================================
function fnSearch() {

var strBeReplaced;
var strReplace;

strBeReplaced = fm1.txtarea2.value;
strReplace = fm1.txtarea3.value;

fnNext();

fm1.txtarea1.focus();
oRange = fm1.txtarea1.createTextRange(); //Create a textRange for the Textarea

// Find the text by findtext method
for (i=1; oRange.findText(strBeReplaced)!=false; i++) {
if(i==intCount){
   oRange.select();   // select the finded text
   oRange.scrollIntoView(); // scroll the page and set the text Into View
   break;
}
oRange.collapse(false);   //
}
}

//==============================================
//function : fnSearch()
//comment : set the flag to the next textrange
//param    : none
//return   : none
//author   : Fantiny
//Date     : 10/21/2005
//==============================================
function fnNext(){

if (intCount > 0 && intCount < intTotalCount){
intCount = intCount + 1;
}
else{
intCount = 1 ;
}
}

//==============================================
//function : init()
//comment : initialize at page onload to get the count
//param    : none
//return   : none
//author   : Fantiny
//Date     : 10/21/2005
//==============================================
function init(){

var oRange ;
var strBeRepalced;

oRange = fm1.txtarea1.createTextRange(); //Create a textRange for the Textarea
strBeReplaced = fm1.txtarea2.value;

for (i=0; oRange.findText(strBeReplaced)!=false; i++) {
oRange.collapse(false); // Moves the insertion point to the end of the text range.
}

intTotalCount = i ;

}

//==============================================
//function : fnReplace()
//comment : replace the text of the selected textrange
//param    : none
//return   : none www.knowsky.com
//author   : Fantiny
//Date     : 10/21/2005
//==============================================
function fnReplace(){

var strReplace;

strReplace = fm1.txtarea3.value;

// if the textrange is exist, replace the text
if(oRange!= null && typeof(oRange)=="object" && intTotalCount > 0){
oRange.text = strReplace;
intCount = intCount - 1;
intTotalCount = intTotalCount - 1;
oRange = null;
}
}
//-->
</SCRIPT>
</HEAD>
<BODY onload="init()">
<FORM METHOD=POST name="fm1">
<TEXTAREA NAME="txtarea1" ROWS="20" COLS="50">
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
this is the original text, and this is the string will be repalced.
</TEXTAREA>
<TEXTAREA NAME="txtarea2" ROWS="20" COLS="50"> will be </TEXTAREA>
<TEXTAREA NAME="txtarea3" ROWS="20" COLS="50"> has been </TEXTAREA>
<input type="button" value="search" onclick="fnSearch()">
<input type="button" value="Replace" onclick="fnReplace()">
</FORM>