function chkform()
{
    var orid=document.getElementById("orderid").value;
    if(orid.length<5||orid.length>26)
    {alert("订单号错误!!"); return false;}
    if(checknumber(orid))
    {alert("订单号错误!!"); return false;}
    return true;
}
function checknumber(String) 
{ 
    var Letters = "1234567890."; 
    var i; 
    var c; 
    for( i = 0; i < String.length; i ++ ) 
    { 
        c = String.charAt( i ); 
        if (Letters.indexOf( c ) ==-1) 
        { return true; } 
    } 
    return false; 
}
document.write ('<div style="text-align:center; margin:0; padding:0">');
document.write ('<form action="Product_Order_result.asp" method="post" style="padding:0; margin:0"  target="_blank">');
document.write ('<input name="orderid" type="text" size="20" style="border: 1px solid;  height:16px; margin-bottom:6px; margin-right:3px" />');
document.write ('<input name="step" type="hidden" value="search_pay" class="sinput" /><input name="submit_s" type="submit" value=" 查询该订单号 " class="sbutton" style="margin-bottom:6px" /></form></div>');