javascript 选择文本
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"value="text"><input type="button"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"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
<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" >
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>
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