createtextrange createrange区别:
对象或元素不同,虽然都是返回TextRange。例如:
var r=document.body.createTextRange()
var r=document.createRange()
document. createTextRange 可以对body、TEXTAREA、BUTTON创建TextRange,Range -- 范围
返回createTextRange的text和htmlText
- <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">
获取指定文本框中的选中的文字:只响应第一个文本框
- <input id="inp1" type="text" value="1234567890">
- <input id="inp2" type="text" value="9876543210">
- <input type="button" onclick="test()" value="确定">
- <script language="javascript">
- function test()
- {
- var o=document.getElementById("inp1")
- var r = document.selection.createRange();
- if(o.createTextRange().inRange(r))
- alert(r.text);
- }
- </script>
页面文本倒序查找
- abababababababa
- <input value="倒序查找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>
聚焦控件后把光标放到最后
- <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()">
得到文本框内光标位置
- <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="得到光标位置" onclick=getPos(txt1)>
控制input框内光标位置
- <script language="javascript">
- function setPos(num)
- {
- text1.focus();
- var e =document.getElementById("text1");
- var r =e.createTextRange();
- r.moveStart('character',num);
- r.collapse(true);
- r.select();
- }
- </script>
- <input type="text" id="text1" 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>
选中文本框中的一段文字
- <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>
控制文本框内光标的移动
- <input type="button" value="<" onclick=go(-1)>
- <input id="demo" value="这里是文字">
- <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>
取光标位置
- <body>
- <div id=box>点击textarea</div>
- <mce:script type="text/javascript"><!--
- function doit()
- {
- var rng = event.srcElement.createTextRange();
- rng.moveToPoint(event.x,event.y);
- rng.moveEnd("character",event.srcElement.value.length)
- box.innerText = "光标位置:" + (event.srcElement.value.length - rng.text.length)
- }
- // --></mce:script>
- <textarea onclick=doit() rows="6" cols="33">sdfsdfsdfsdfsdfsdfsdf
在文本框中设置内容后,在将选定的文本删除
- <script>
- function storeCaret (textEl) {
- if (textEl.createTextRange)
- textEl.caretPos = document.selection.createRange().duplicate();
- }
- function insertAtCaret (textEl, text) {
- if (textEl.createTextRange && textEl.caretPos) {
- var caretPos = textEl.caretPos;
- caretPos.text =caretPos.text.charAt(caretPos.text.length - 1) == ' ' ?text + ' ' : text;
- } else
- textEl.value = text;
- }
- function deleteAtCaret (textEl) {
- if (textEl.createTextRange && textEl.caretPos) {
- var caretPos = textEl.caretPos;
- document.selection.clear();
- }
- //alert(aForm.aTextArea.
- }
- </script>
- <form name=aForm>
- <input name=aTextArea size=120 wrap=soft onselect="storeCaret(this);" onclick="storeCaret(this);" onkeyup="storeCaret(this);" value=这是例子,你可以在这里添加文字、插入文字。>
- <br>
- <input type=text name=aText size=80 value=我要在光标处插入这些文字><br>
- <input type=button value=我要在光标处插入上面文本框里输入的文字! onclick="insertAtCaret(this.form.aTextArea, this.form.aText.value);">
- <input type=button value=删除选中文字 onclick=deleteAtCaret(this.form.aTextArea); id=button1 name=button1>
- </FORM>