JS在TextArea光标位置插入文字+移动光标到文字末尾

 

 

function insertText(obj,str) {

    if (document.selection) {

        var sel = document.selection.createRange();

        sel.text = str;

    } else if (typeof obj.selectionStart === 'number' && typeof obj.selectionEnd === 'number') {

        var startPos = obj.selectionStart,

            endPos = obj.selectionEnd,

            cursorPos = startPos,

            tmpStr = obj.value;

        obj.value = tmpStr.substring(0, startPos) + str + tmpStr.substring(endPos, tmpStr.length);

        cursorPos += str.length;

        obj.selectionStart = obj.selectionEnd = cursorPos;

    } else {

        obj.value += str;

    }

}

function moveEnd(obj){

    obj.focus();

    var len = obj.value.length;

    if (document.selection) {

        var sel = obj.createTextRange();

        sel.moveStart('character',len);

        sel.collapse();

        sel.select();

    } else if (typeof obj.selectionStart == 'number' && typeof obj.selectionEnd == 'number') {

        obj.selectionStart = obj.selectionEnd = len;

    }


}