function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值
{
    var Minutes = 10; //此 cookie 将被保存 10分钟
    var exp  = new Date();    //new Date("December 31, 9998");
    exp.setTime(exp.getTime() + Minutes*60*1000);
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
function getCookie(name)//取cookies函数        
{
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
     if(arr != null) return unescape(arr[2]); return null;

}
function delCookie(name)//删除cookie
{
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval=getCookie(name);
    if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}


function addnum( obj , wa,num )
    {       
        var tex = document.getElementById(obj);        
        var warn = document.getElementById(wa);    
        var v = /^[1-9]d*|0$/;
        if(!v.test(tex.value) || num == 0)
        {           
           return;
        }
        else
        {
           if(tex.value != "" && tex.value != "undefined" )
           {
              if(tex.value < 5)
              {tex.value = parseInt(tex.value) + 1;}
           }
           else
           {
              tex.value = 1;
           }
        }       
    }       
    function subnum( obj ,wa,num)
    {
        var tex = document.getElementById(obj);
        var warn = document.getElementById(wa);        
        var v = /^[1-9]d*|0$/;
        if(!v.test(tex.value) || num == 0)
        {          
           return;
        }
        else
        {
           if(tex.value != "" && tex.value != "undefined" )
           {
              var ds = parseInt(tex.value) - 1;
              if(ds > -1)
              {
                 tex.value = ds;
              }
           }
           else
           {
              tex.value = 1;
           }
        }
    }