本文实例讲述了jQuery往textarea中光标所在位置插入文本的方法。分享给大家供大家参考。具体实现方法如下：
<html>
<head>
<script src="jquery-1.8.1.min.js"></script>
<script >
$(function() {
/* 在textarea处插入文本--Start */
(function($) {
$.fn.extend({
insertContent : function(myValue, t) {
var $t = $(this)[0];
if (document.selection) { // ie
this.focus();
var sel = document.selection.createRange();
sel.text = myValue;
this.focus();
sel.moveStart('character', -l);
var wee = sel.text.length;
if (arguments.length == 2) {
var l = $t.value.length;
sel.moveEnd("character", wee + t);
t <= 0 ? sel.moveStart("character", wee - 2 * t - myValue.length) : sel.moveStart( "character", wee - t - myValue.length);
sel.select();
}
} else if ($t.selectionStart
|| $t.selectionStart == '0') {
var startPos = $t.selectionStart;
var endPos = $t.selectionEnd;
var scrollTop = $t.scrollTop;
$t.value = $t.value.substring(0, startPos)
+ myValue
+ $t.value.substring(endPos,$t.value.length);
this.focus();
$t.selectionStart = startPos + myValue.length;
$t.selectionEnd = startPos + myValue.length;
$t.scrollTop = scrollTop;
if (arguments.length == 2) {
$t.setSelectionRange(startPos - t,
$t.selectionEnd + t);
this.focus();
}
} else {
this.value += myValue;
this.focus();
}
}
})
})(jQuery);
/* 在textarea处插入文本--Ending */
});
$(document).ready(function(){
$("#ch_button").click( function () {
$("#test_in").insertContent("<upload/day_140627/201406271546349972.jpg>");
});
});
</script>
</head>
<body >
<button id="ch_button" value="插入" >插入</button>
<textarea name="content" id="test_in" rows="30" cols="100">
</textarea>
</body>
</html>
希望本文所述对大家的jQuery程序设计有所帮助。
