//id是input框的id的名字，time是軟鍵盤多少時間消失

function objBlur(id,time){
    if(typeof id != 'string') throw new Error('objBlur()引數錯誤');var obj = document.getElementById(id),
time = time || 300,
docTouchend = function(event){
            if(event.target!= obj){
                setTimeout(function(){
                    obj.blur
 
();
document.removeEventListener('touchend', docTouchend,false);
},time);
}
        };
if(obj){
        obj.addEventListener('focus', function(){
            document.addEventListener('touchend', docTouchend,false);
},false);
}else{
        throw new Error('objBlur()沒有找到元素');}
}