function FormValidator(formNode)
{
    this.errorMessage="";
    this.formNode=formNode;
}
FormValidator.prototype={
addRule:function(fieldName,message,validatorType,args){
    validatorType=validatorType.toLowerCase(validatorType);
    var element=this.formNode[fieldName];
    if(element!=null){
        switch(validatorType){
            case"required":this.required(element,message);break;
            case"rangelength":this.rangelength(element,message,args[0],args[1]);break;
            case"rangevalues":this.rangevalues(element,message,args[0],args[1]);break;
            case"numeric":this.numeric(element,message);break;
            case"positivenumber":this.positivenumber(element,message);break;
            case"integer":this.integer(element,message);break;
            case"positiveinteger":this.positiveinteger(element,message);break;
            case"lettersonly":this.lettersonly(element,message);break;
            case"zipcode":this.zipcode(element,message);break;
            case"email":this.email(element,message);break;
            case"ischecked":this.ischecked(element,message,args);break;
            case"compare":var elementPivot=this.formNode[args];
                if(elementPivot!=null)this.compare(element,message,elementPivot);break;
            case"creditcard":this.creditcard(element,message);break;
            case"expression":this.expression(element,message,args);break;
            default:}
            }
       },markField:function(element,bg_color,border_color){
            if(element.length){
                for(var j=0;j<element.length;j++){
                    element[j].style.backgroundColor=bg_color;
                    element[j].style.borderColor=border_color;
                    }
                }else{
                    element.style.backgroundColor=bg_color;
                    element.style.borderColor=border_color;
                    }
                },getValue:function(e){
                    var r='';
                    if(e.tagName=='SELECT'){
                        if(e.selectedIndex!=-1){
                            r=e.options[e.selectedIndex].getAttribute('value');
                            if(!r){
                                r=e.options[e.selectedIndex].text;
                                }
                           }else{
                                r='';
                                }
                           }else if(e.length!=undefined){
                                for(i=0;i<e.length;i++){
                                    if(e[i].checked){
                                        r=e[i].value;
                                        break;
                                        }
                                    }
                                }
                                else{r=e.value;}
                            return r;
                            },invalidField:function(element,message)
                                {
                                this.markField(element,"#bbc525","#FF9933");
                                this.errorMessage=this.errorMessage+message+"\n";
                                },required:function(element,message){
                                    if(!/\S/.test(this.getValue(element))){
                                        this.invalidField(element,message);
                                        }
                                    },rangelength:function(element,message,minLength,maxLength){
                                        var val=this.getValue(element);
                                        if((minLength!=null&&val.length<minLength)||(maxLength!=null&&val.length>maxLength)){
                                            this.invalidField(element,message);
                                            }
                                        },rangevalues:function(element,message,minValue,maxValue){
                                            var val=this.getValue(element);
                                            if((minValue!=null&&val<minValue)||(maxValue!=null&&val>maxValue)){
                                                this.invalidField(element,message);
                                                }
                                            },numeric:function(element,message){
                                                var val=this.getValue(element);
                                                if(val.length>0&&!/^(\-?(\d+\.?\d+)|(-?\d+)){1}$/.test(val)){
                                                    this.invalidField(element,message);
                                                    }
                                                },positivenumber:function(element,message){
                                                    var val=this.getValue(element);
                                                    if(val.length>0&&!/^((\d+\.?\d+)|(\d+)){1}$/.test(val)){
                                                        this.invalidField(element,message);
                                                        }
                                                    },integer:function(element,message){
                                                        var val=this.getValue(element);
                                                        if(val.length>0&&!/^-?\d+$/.test(val)){
                                                            this.invalidField(element,message);
                                                            }
                                                        },positiveinteger:function(element,message){
                                                            var val=this.getValue(element);
                                                                if(val.length>0&&!/^\d+$/.test(val)){
                                                                    this.invalidField(element,message);
                                                                    }
                                                                 },lettersonly:function(element,message){
                                                                     var val=this.getValue(element);
                                                                     if(val.length>0&&!/^[a-zA-Z\s]+$/.test(val)){
                                                                        this.invalidField(element,message);
                                                                        }
                                                                     },zipcode:function(element,message){
                                                                        var val=this.getValue(element);
                                                                        if(val.length>0&&!/^\d{5}$/.test(val)){
                                                                            this.invalidField(element,message);
                                                                            }
                                                                        },email:function(element,message){
                                                                            var val=this.getValue(element);
                                                                            if(val.length>0&&!/^\S+@\S+(\.\S+)*\.(\S{2,3}|info)$/i.test(val)||/[\(\)\<\>\,\;\:\\\"\[\]]/.test(val)){
                                                                                this.invalidField(element,message);
                                                                                }
                                                                            },ischecked:function(element,message,args){
                                                                                var me=this;
                                                                                var operator="or";
                                                                                function verifyGroup(element){
                                                                                    var i=0;
                                                                                    var flag=(operator=='and')?true:false;
                                                                                    if(element.length){
                                                                                        while(i<element.length){
                                                                                            if(operator=="and"){
                                                                                                flag=flag&&element[i].checked;
                                                                                             }else{
                                                                                                flag=flag||element[i].checked;
                                                                                             }
                                                                                             i++;
                                                                                         }
                                                                                         if(!flag){
                                                                                            for(var j=0;j<element.length;j++)
                                                                                                me.markField(element[j],"#F5EDB4","#FF9933");
                                                                                                me.invalidField(element[0],message);
                                                                                                }
                                                                                            }else{
                                                                                                if(element.checked==false)
                                                                                                me.invalidField(element,message);
                                                                                                }
                                                                                            };
                                                                                            if(args){
                                                                                                operator=(args[0].toLowerCase()=="all")?"and":"or";
                                                                                                    if(args.length>1){
                                                                                                        var tmpArr=new Array();
                                                                                                        tmpArr=tmpArr.concat(element);
                                                                                                        for(var i=1;i<args.length;i++){
                                                                                                            tmpArr=tmpArr.concat(me.formNode[args[i]]);
                                                                                                            }
                                                                                                        element=tmpArr;
                                                                                                    }
                                                                                                 }
                                                                                                 verifyGroup(element);
                                                                                            },compare:function(element,message,elementPivot){
                                                                                                var val=this.getValue(element),valPivot=this.getValue(elementPivot);
                                                                                                if(val!=valPivot){
                                                                                                    this.markField(elementPivot,"#F5EDB4","#FF9933");
                                                                                                    this.invalidField(element,message);
                                                                                                    }
                                                                                                },expression:function(element,message,regularExpression){
                                                                                                    if(!regularExpression.test(this.getValue(element))){
                                                                                                        this.invalidField(element,message);
                                                                                                        }
                                                                                                },creditcard:function(element,message,regularExpression){
                                                                                                    var v="0123456789",w="",s=this.getValue(element);s=s.replace(/\D/g,"");
                                                                                                    for(i=0;i<s.length;i++){x=s.charAt(i);
                                                                                                    if(v.indexOf(x,0)!=-1)w+=x;
                                                                                                }j=w.length/2;
                                                                                                if(j<6.5||j>8||j==7){
                                                                                                    this.invalidField(element,message);
                                                                                                    return;
                                                                                                }
                                                                                                k=Math.floor(j);
                                                                                                m=Math.ceil(j)-k;
                                                                                                c=0;
                                                                                                for(i=0;i<k;i++){
                                                                                                    a=w.charAt(i*2+m)*2;
                                                                                                    c+=a>9?Math.floor(a/10+a%10):a;
                                                                                                    }
                                                                                               for(i=0;i<k+m;i++){
                                                                                                c+=w.charAt(i*2+1-m)*1};
                                                                                                if(c%10!=0){
                                                                                                    this.invalidField(element,message);
                                                                                                }
                                                                                               },validate:function(){
                                                                                                    if(this.errorMessage!=""){
                                                                                                        alert(this.errorMessage);
                                                                                                        return false;
                                                                                                    }
                                                                                                    return true;
                                                                                               }
                                                                                          };