textarea从光标位置插入字符
textarea从光标处插入字符串方法：
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<html> <head> <title>TextArea光标定位</title> </head> <body> <script language=Javascript> function AddOnPos(obj,charvalue){ //obj代表要插入字符的输入框 //value代表要插入的字符 //obj.document.designMode = "On"; obj.focus(); var r = document.selection.createRange(); var ctr = obj.createTextRange(); var i; var s = obj.value; //注释掉的这种方法只能用在单行的输入框input内，对多行输入框textarea无效 //r.setEndPoint( "StartToStart",ctr); //i = r.text.length; //取到光标位置----Start---- var ivalue = "&^asdjfls2FFFF325%$^&"; r.text = ivalue; i = obj.value.indexOf(ivalue); r.moveStart("character",-ivalue.length); r.text = " "; //取到光标位置----End---- //插入字符 obj.value = s.substr(0,i) + charvalue + s.substr(i,s.length); ctr.collapse(true); ctr.moveStart( "character",i + charvalue.length); ctr.select(); } function toAdd(){ var obj=document.all("oTxt"); var str=document.all("oTxt1").value; AddOnPos(obj,str) } </script> <!--<input type="text" name="oTxt" id="oTxt" value="shism">--> <textarea name="oTxt" id="oTxt" cols="60" rows="20"></textarea> <hr> <input type="text" name="oTxt1" id="oTxt1"> <input type="button" value="test" onclick="toAdd()"> </body> </html>