JS Obtenez la position de la position du curseur et définissez le code de position du curseur de la zone de texte

复制代码代码如下:

<script type = "text / javascript">

fonction gettxt1cursorposition () {

var otxt1 = document.getElementById ("txt1");

var cursurposition = -1;

if (otxt1.selectionstart) {// 非 ie 浏览器

cursurposition = otxt1.selectionstart;

} else {// ie

var range = document.selection.creareange ();

range.movestart ("caractère", - otxt1.value.length);

cursurposposition = range.text.length;

}

alerte (cursurposition);

}

fonction settxt1cursorposition (i) {

var otxt1 = document.getElementById ("txt2");

var cursurposition = -1;

if (otxt1.selectionstart) {// 非 ie 浏览器

otxt1.selectionstart = i;

} else {// ie

var range = otxt1.CreateExtrange ();

range.move ("personnage", i);

range.select ();

}

}

fonction getta1cursorposition () {

var evt = window.event? window.event: getta1CursorPosition.Caller.Arguments [0];

var ota1 = document.getElementById ("ta1");

var cursurposition = -1;

if (ota1.selectionstart) {// 非 ie 浏览器

Cursurposition = OTA1.Selectionstart;

} else {// ie

var range = ota1.CreateExtrange ();

range.movetOpoint (evt.x, evt.y);

range.movestart ("caractère", - ota1.value.length);

cursurposposition = range.text.length;

}

alerte (cursurposition);

}

fonction Setta1CursorPosition (i) {

var ota2 = document.getElementById ("ta2");

if (ota2.Selectionstart) {// 非 ie 浏览器

OTA2.SelectionStart = i;

OTA2.SelectionDend = i;

} else {// ie

var range = ota2.CreateTextrange ();

range.move ("personnage", i);

range.select ();

}

}

</cript>