createTextRange()的使用(含文本框选中部分文字内容)

来源：互联网发布：java彩票合买系统搭建编辑：程序博客网时间：2024/04/29 09:29

<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("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>

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>

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