The input box based on jQuery inserts content at the cursor position and selects _jquery

Copy code The code is as follows:

//
//How to use
//$ (Text field selector).insertContent("InsertContent");
//$(Text field selector).insertContent("InsertContent", value); //Select both sides of the inserted text content based on the value Border, value: 0 means all inserted text is selected, -1 means one less character is selected on both sides of the inserted text.
//
//Insert content at the cursor position and select
(function($) {
$.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);