The use example of createTextRange of contains a text box with selected text content

 
<script language="javascript"> 
function test() 
{ 
var rng=document.body.createTextRange(); 
alert(rng.text) 
} 
function test1() 
{ 
var rng=document.body.createTextRange(); 
alert(rng.htmlText) 
} 
</script> 
<input type="button" onclick="test()" value="text"> 
<input type="button" onclick="test1()" value="htmlText"> 

Gets the selected text in the specified text box: responds only to the first text box

 
<input id="inp1" type="text" value="1234567890"> 
<input id="inp2" type="text" value="9876543210"> 
<input type="button" onclick="test()" value=" determine "> 
<script language="javascript"> 
function test() 
{ 
var o=document.getElementById("inp1") 
var r = document.selection.createRange(); 
if(o.createTextRange().inRange(r)) 
alert(r.text); 
} 
</script> 

Page text search in reverse order

 
abababababababa 
<input value=" Reverse lookup a" onclick=myfindtext("a") type="button"> 
<script language ='javascript'> 
var rng = document.body.createTextRange(); 
function myfindtext(text) 
{ 
rng.collapse(false); 
if(rng.findText(text,-1,1)) 
{ 
rng.select(); 
rng.collapse(true); 
}else 
{alert("end");} 
} 
</script> 

Focus the control and move the cursor to the end

 
<script language="javascript"> 
function setFocus() 
{ 
var obj = event.srcElement; 
var txt =obj.createTextRange(); 
txt.moveStart('character',obj.value.length); 
txt.collapse(true); 
txt.select(); 
} 
</script> 
<input type="text" value="http://toto369.net" onfocus="setFocus()"> 

Gets the cursor position in the text box

 
<script language="javascript"> 
function getPos(obj){ 
obj.focus(); 
var s=document.selection.createRange(); 
s.setEndPoint("StartToStart",obj.createTextRange()) 
alert(s.text.length); 
} 
</script> 
<input type="text" id="txt1" value="1234567890"> 
<input type="button" value=" Get cursor position " onclick=getPos(txt1)> 

Controls the cursor position in the input box

 
<script language="javascript"> 
function setPos(num) 
{ 
text1.focus(); 
var e =document.getElementById("text5"); 
var r =e.createTextRange(); 
r.moveStart('character',num); 
r.collapse(true); 
r.select(); 
} 
</script> 
<input type="text" id="text5" value="1234567890"> 
<select onchange="setPos(this.selectedIndex)"> 
<option value="0">0</option> 
<option value="1">1</option> 
<option value="2">2</option> 
<option value="3">3</option> 
<option value="4">4</option> 
<option value="5">5</option> 
<option value="6">6</option> 
<option value="7">7</option> 
</select> 

Select a paragraph of text in the text box

 
<script language=javascript> 
function sel(obj,num) 
{ 
var rng=obj.createTextRange() 
var sel = rng.duplicate(); 
sel.moveStart("character", num); 
sel.setEndPoint("EndToStart", rng); 
sel.select(); 
} 
</script> 
<input type="text" id="text1" value="1234567890"> 
<select onchange="sel(text1,this.value)"> 
<option value="0">0</option> 
<option value="1">1</option> 
<option value="2">2</option> 
<option value="3">3</option> 
<option value="4">4</option> 
<option value="5">5</option> 
<option value="6">6</option> 
<option value="7">7</option> 
</select> 

Controls the movement of the cursor in the text box

 
<input type="button" value="<" onclick=go(-1)> 
<input id="demo" value=" Here is the text "> 
<input type="button" value=">" onclick=go(1)> 
<script language="javascript"> 
function go(n){ 
demo.focus(); 
with(document.selection.createRange()) 
{ 
moveStart("character",n); 
collapse(); 
select(); 
} 
} 
</script>