textarea光标移到末尾兼容ie,ffchrome

function moveEnd(obj){

obj.focus();

var len = obj.value.length;

if (document.selection) {//ie识别

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;//ff和chrome

}

}

只用调用方法，传进去对象即可，jquery示例：moveEnd($(".moreComment  textarea")[0]);