```javascriptfunction getElementById(id) {
return document.getElementById(id);
}
function show() {
getElementById('allsort').className = 'allsort allsorthover';
}
function hide() {
getElementById('allsort').className = 'allsort';
}
function showDiv(n) {
var element = getElementById('m_c_' + n);
element.style.display = 'block';
getElementById(n).className = 'item fore hover';
getElementById('allsort').className = 'allsort allsorthover';
}
function hideDiv(n) {
var element = getElementById('m_c_' + n);
element.style.display = 'none';
getElementById(n).className = 'item fore';
hide();
}
function checkSearchForm() {
if (document.getElementById('key').value) {
return true;
} else {
alert("请输入搜索关键词");
return false;
}
}
function search(id) {
var selKey = document.getElementById(id).value, url = "search.php?keywords=";
window.location = url + selKey;
}
```
