document.getElementById("sword").onfocus=function(){
    if(document.getElementById("sword").value=="请输入您要搜索的产品名称或货号" || document.getElementById("sword").value.length<1){
        document.getElementById("sword").className="Tsword";
        document.getElementById("sword").value="";
    }
    else
        document.getElementById("sword").select();
}
document.getElementById("sword").onblur=function(){
    if(document.getElementById("sword").value=="请输入您要搜索的产品名称或货号" || document.getElementById("sword").value.length<1){
        document.getElementById("sword").className="Ssword";
        document.getElementById("sword").value="请输入您要搜索的产品名称或货号";
    }
}
document.getElementById("formSearchPro").onsubmit=function(){if(document.getElementById("sword").value=="请输入您要搜索的产品名称或货号" || document.getElementById("sword").value.length<1){alert("请输入您要搜索的产品名称或货号。");return false;}}
document.getElementById("formSearchCor").onsubmit=function(){if(document.getElementById("keywords2").value=="请输入您要搜索的公司名称" || document.getElementById("sword").value.length<1){alert("请输入您要搜索的公司名称。");return false;}}
document.getElementById("formSellerInfo").onsubmit=function(){if(document.getElementById("KeyWord").value=="请输入您要搜索的求购信息" || document.getElementById("sword").value.length<1){alert("请输入您要搜索的求购信息。");return false;}}
document.getElementById("formSearchInfo").onsubmit=function(){if(document.getElementById("keywords1").value=="请输入您要搜索的资讯信息" || document.getElementById("sword").value.length<1){alert("请输入您要搜索的资讯信息。");return false;}}

document.getElementById("keywords2").onfocus=function(){
    if(document.getElementById("keywords2").value=="请输入您要搜索的公司名称" || document.getElementById("keywords2").value.length<1){
        document.getElementById("keywords2").className="Tsword";
        document.getElementById("keywords2").value="";
    }
    else
        document.getElementById("keywords2").select();
}
document.getElementById("keywords2").onblur=function(){
    if(document.getElementById("keywords2").value=="请输入您要搜索的公司名称" || document.getElementById("keywords2").value.length<1){
        document.getElementById("keywords2").className="Ssword";
        document.getElementById("keywords2").value="请输入您要搜索的公司名称";
    }
}
document.getElementById("keywords1").onfocus=function(){
    if(document.getElementById("keywords1").value=="请输入您要搜索的资讯信息" || document.getElementById("keywords1").value.length<1){
        document.getElementById("keywords1").className="Tsword";
        document.getElementById("keywords1").value="";
    }
    else
        document.getElementById("keywords1").select();
}
document.getElementById("keywords1").onblur=function(){
    if(document.getElementById("keywords1").value=="请输入您要搜索的资讯信息" || document.getElementById("keywords1").value.length<1){
        document.getElementById("keywords1").className="Ssword";
        document.getElementById("keywords1").value="请输入您要搜索的资讯信息";
    }
}
document.getElementById("KeyWord").onfocus=function(){
    if(document.getElementById("KeyWord").value=="请输入您要搜索的求购信息" || document.getElementById("KeyWord").value.length<1){
        document.getElementById("KeyWord").className="Tsword";
        document.getElementById("KeyWord").value="";
    }else
        document.getElementById("KeyWord").select();
}
document.getElementById("KeyWord").onblur=function(){
    if(document.getElementById("KeyWord").value=="请输入您要搜索的求购信息" || document.getElementById("KeyWord").value.length<1){
        document.getElementById("KeyWord").className="Ssword";
        document.getElementById("KeyWord").value="请输入您要搜索的求购信息";
    }
}

function setTab(n) {
    var tli = document.getElementById("SearchBoxTitle").getElementsByTagName("li");
    var mli = document.getElementById("SearchBoxInfo").getElementsByTagName("li");
    for (i = 0; i < tli.length; i++) {
        tli[i].className = i == n ? "Select" : "";
        mli[i].style.display = i == n ? "block" : "none";
    }
}