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Editing: textatcursor.js

/*
insert text at the position of the cursor in a HTML textarea
Version: 1.0
Original code: Arnan de Gans
Copyright: (c) 2020 Arnan de Gans
*/
function textatcursor(areaId,text) {
	var txtarea = document.getElementById(areaId);
	var scrollPos = txtarea.scrollTop;
	var strPos = 0;
	var br = ((txtarea.selectionStart || txtarea.selectionStart == '0') ? "ff" : (document.selection ? "ie" : false ) );

if(br == "ie") {
		txtarea.focus();
		var range = document.selection.createRange();
		range.moveStart ('character', -txtarea.value.length);
		strPos = range.text.length;
	} else if(br == "ff") {
		strPos = txtarea.selectionStart;
	}

var front = (txtarea.value).substring(0,strPos);
	var back = (txtarea.value).substring(strPos,txtarea.value.length);
	txtarea.value=front+text+back;
	strPos = strPos + text.length;
	if(br == "ie") {
		txtarea.focus();
		var range = document.selection.createRange();
		range.moveStart ('character', -txtarea.value.length);
		range.moveStart ('character', strPos);
		range.moveEnd ('character', 0);
		range.select();
	} else if(br == "ff") {
		txtarea.selectionStart = strPos;
		txtarea.selectionEnd = strPos;
		txtarea.focus();
	}
	txtarea.scrollTop = scrollPos;
}

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