html5 实现输入框实时搜索

function searchText(){
            var content ="";
            var inputVal=$('#siteInput').val();
            var siteNum = {'张三':"桌1", '李四':"桌2"};
            var found = false;
            for( var key in siteNum){
                if(key == inputVal) {
                    content = siteNum[key];
                    found = true;
                }
            }
            if(!found && inputVal != "") {
                content = '未找到';
            }
            $('#siteSearch>p').text(content);
        }

        this.initSearchSite=function() {
            $("input:text").bind("input propertychange",function(){
                 searchText();
            });
        }