function SearchForm() { 
if (document.frmSearch.Keyword.value == "") {
    alert("ÇëÌîдËÑË÷µÄ¹Ø¼ü×Ö£¡");
    document.frmSearch.Keyword.focus();
    return false;
}

Item = document.frmSearch.sltItem.value;
if (Item == "info") { document.frmSearch.action = "../info/search.asp"; }
if (Item == "co") { document.frmSearch.action = "../co/search.asp"; }
if (Item == "need") { document.frmSearch.action = "../need/search.asp"; }
if (Item == "pr") { document.frmSearch.action = "../pr/search.asp"; }

document.frmSearch.submit;
}