HTML代码:
<div class="textarea-group"><textarea class="limit_100 advice"></textarea><div class="limit statistics">0/250</div></div>
JS代码:
var bind_name = 'input';if (navigator.userAgent.indexOf("MSIE") != -1) { //(此处是为了兼容IE)bind_name = 'propertychange';}if (navigator.userAgent.match(/android/i) == "android") {bind_name = "keyup";}$(".limit_100").bind(bind_name, function() {var limitSub = $(this).val().substr(0, 250);$(this).val(limitSub); //截取字符长度$(this).next('.statistics').html(limitSub.length + '/250'); //获取实时输入字符长度并显示if (limitSub.length == 250) {$('.limit').css('color', 'red'); //超出指定字符长度标红提示alert('你已超出250个字!');} else {$('.limit').css('color', '#333');}});