function ckemail(obj){
        if(email[0]!=obj.value){
            if(emailcheck(obj.value)){
                changetips('email',1,'tips-loading');
                email=Array(obj.value,1,'tips-loading');                
                regpost.location.href="Asp/Regadd.asp?act=em&email="+encodeURI(obj.value);
            }else{
                changetips('email',3,'tips-error');
                email=Array(obj.value,3,'tips-error');
            }
        }else{
            if(obj.value==""){
                changetips('email',0,'tips-error');
            }else{
                changetips('email',email[1],email[2]);
            }
        }
    }
    function regcheck(obj){
        if(!obj.agreement.checked){
            changetips('agreement',5,'tips-error');
            return false;
        }
我在下面这个函数里怎么调用上面ckemail(obj)这个函数啊?

怎么没有人回我话啊?

function ckemail(obj){
        if(email[0]!=obj.value){
            if(emailcheck(obj.value)){
                changetips('email',1,'tips-loading');
                email=Array(obj.value,1,'tips-loading');               
                regpost.location.href="Asp/Regadd.asp?act=em&email="+encodeURI(obj.value);
            }else{
                changetips('email',3,'tips-error');
                email=Array(obj.value,3,'tips-error');
            }
        }else{
            if(obj.value==""){
                changetips('email',0,'tips-error');
            }else{
                changetips('email',email[1],email[2]);
            }
        }
    }
    function regcheck(obj){
        ckemail(obj);
        if(!obj.agreement.checked){
            changetips('agreement',5,'tips-error');
            return false;
        }

不行啊.大哥:

说ckemail(obj), Error:'undefined' 为空或不是对象