function setShowLength(obj, maxlength, id) {
setTimeout(function(){
var wid = id;
if (rem < 0){
rem = 0;
}
document.getElementById(wid).innerHTML = "還可以輸入" + rem + "字數";
},100);
function setShowLength(obj, maxlength, id) {
setTimeout(function(){
document.getElementById(wid).innerHTML = "還可以輸入" + rem + "字數";
},100);