// 搜索框不能为空
var SearchSubmit = document.getElementById("search-submit");
var SearchInput = document.getElementById("search-input");
var ItemLeft = document.getElementsByClassName('item-left');
var IconfontSearch = document.getElementById('iconfont-search');
var isSearchCheck = false
SearchSubmit.onclick = function (){
    searchCheck()
}
function searchCheck(){
    // 输入框收起
    SearchInput.style.width = '0px'
    IconfontSearch.style.fontSize = '18px';
    for (var i = 0; i < ItemLeft.length; i++) {
        ItemLeft[i].style.left = '0px';
    }
    if(SearchInput.value ==""){
        if(isSearchCheck){
            isSearchCheck = false
            return false
        }
        alert("关键字不能为空!")
        isSearchCheck = true
        return false;
    }
    return true;
}