<div class="text_top"><span id="textareaSize">0/255</span><i></i></div>
<textarea rows="10" cols="70" id="userReason" onKeyUp="limitChars('userReason', 255)"></textarea></br>
//文本域字数限制
function limitChars(id, count){
var obj = document.getElementById(id);
if (obj.value.length > count){
obj.value = obj.value.substr(0, count);
}
$("#textareaSize").html(obj.value.length+"/"+count);
}
