/*
  -------------------------------------------------------------------------
                            JavaScript Form Validator 
                                Version 2.0.2
        Copyright 2003 JavaScript-coder.com. All rights reserved.
        You use this script in your Web pages, provided these opening credit
    lines are kept intact.
        The Form validation script is distributed free from JavaScript-Coder.com
 
        You may please add a link to JavaScript-Coder.com, 
        making it easy for others to find this script.
        Checkout the Give a link and Get a link page:
        http://www.javascript-coder.com/links/how-to-link.php
 
    You may not reprint or redistribute this code without permission from 
    JavaScript-Coder.com.
 
        JavaScript Coder
        It precisely codes what you imagine!
        Grab your copy here:
                http://www.javascript-coder.com/
    -------------------------------------------------------------------------  
 */
function Validator(frmname) {
    this.formobj=document.forms[frmname];
    if(!this.formobj) {
        alert("BUG: couldnot get Form object "+frmname);
        return;
    }
    if(this.formobj.onsubmit) {
        this.formobj.old_onsubmit = this.formobj.onsubmit;
        this.formobj.onsubmit=null;
    }
    else {
        this.formobj.old_onsubmit = null;
    }
    this.formobj.onsubmit=form_submit_handler;
    this.addValidation = add_validation;
    this.setAddnlValidationFunction=set_addnl_vfunction;
    this.clearAllValidations = clear_all_validations;
}
function set_addnl_vfunction(functionname) {
    this.formobj.addnlvalidation = functionname;
}
function clear_all_validations() {
    for(var itr=0;itr < this.formobj.elements.length;itr++) {
        this.formobj.elements[itr].validationset = null;
    }
}
function form_submit_handler() {
    for(var itr=0;itr < this.elements.length;itr++) {
        if(this.elements[itr].validationset &&
        !this.elements[itr].validationset.validate()) {
            return false;
        }
    }
    if(this.addnlvalidation) {
        str =" var ret = "+this.addnlvalidation+"()";
        eval(str);
        if(!ret) return ret;
    }
    return true;
}
function add_validation(itemname,descriptor,errstr) {
    if(!this.formobj) {
        alert("BUG: the form object is not set properly");
        return;
    }//if
    var itemobj = this.formobj[itemname];
    if(!itemobj) {
        alert("BUG: Couldnot get the input object named: "+itemname);
        return;
    }
    if(!itemobj.validationset) {
        itemobj.validationset = new ValidationSet(itemobj);
    }
    itemobj.validationset.add(descriptor,errstr);
}
function ValidationDesc(inputitem,desc,error) {
    this.desc=desc;
    this.error=error;
    this.itemobj = inputitem;
    this.validate=vdesc_validate;
}
function vdesc_validate() {
    if(!V2validateData(this.desc,this.itemobj,this.error)) {
        this.itemobj.focus();
        return false;
    }
    return true;
}
function ValidationSet(inputitem) {
    this.vSet=new Array();
    this.add= add_validationdesc;
    this.validate= vset_validate;
    this.itemobj = inputitem;
}
function add_validationdesc(desc,error) {
    this.vSet[this.vSet.length]= 
    new ValidationDesc(this.itemobj,desc,error);
}
function vset_validate() {
    for(var itr=0;itr<this.vSet.length;itr++) {
        if(!this.vSet[itr].validate()) {
            return false;
        }
    }
    return true;
}
function validateEmailv2(email) {
    // a very simple email validation checking. 
    // you can add more complex email checking if it helps 
    if(email.length <= 0) {
        return true;
    }
    var splitted = email.match("^(.+)@(.+)$");
    if(splitted == null) return false;
    if(splitted[1] != null ) {
        var regexp_user=/^\"?[\w-_\.]*\"?$/;
        if(splitted[1].match(regexp_user) == null) return false;
    }
    if(splitted[2] != null) {
        var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
        if(splitted[2].match(regexp_domain) == null) {
            var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
            if(splitted[2].match(regexp_ip) == null) return false;
        }// if
        return true;
    }
    return false;
}
function V2validateData(strValidateStr,objValue,strError) { 
    var epos = strValidateStr.search("="); 
    var  command  = ""; 
    var  cmdvalue = ""; 
    if(epos >= 0) { 
        command  = strValidateStr.substring(0,epos); 
        cmdvalue = strValidateStr.substr(epos+1); 
    } 
    else { 
        command = strValidateStr; 
    } 
    switch(command) { 
        case "req": 
        case "required": { 
            if(eval(objValue.value.length) == 0) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name + " : Required Field"; 
                }//if 
                alert(strError); 
                return false; 
            }//if 
            break;             
        }//case required 
        case "maxlength": 
        case "maxlen": { 
            if(eval(objValue.value.length) >  eval(cmdvalue)) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name + " : "+cmdvalue+" characters maximum "; 
                }//if 
                alert(strError + "\n[Current length = " + objValue.value.length + " ]"); 
                return false; 
            }//if 
            break; 
        }//case maxlen 
        case "minlength": 
        case "minlen": { 
            if(eval(objValue.value.length) <  eval(cmdvalue)) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name + " : " + cmdvalue + " characters minimum  "; 
                }//if               
                alert(strError + "\n[Current length = " + objValue.value.length + " ]"); 
                return false;                 
            }//if 
            break; 
        }//case minlen 
        case "alnum": 
        case "alphanumeric": { 
            var charpos = objValue.value.search("[^A-Za-z0-9]"); 
            if(objValue.value.length > 0 &&  charpos >= 0) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name+": Only alpha-numeric characters allowed "; 
                }//if 
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
            }//if 
            break; 
        }//case alphanumeric 
        case "num": 
        case "numeric": { 
            var charpos = objValue.value.search("[^0-9]"); 
            if(objValue.value.length > 0 &&  charpos >= 0) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name+": Only digits allowed "; 
                }//if               
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
            }//if 
            break;               
        }//numeric 
        case "alphabetic": 
        case "alpha": { 
            var charpos = objValue.value.search("[^A-Za-z]"); 
            if(objValue.value.length > 0 &&  charpos >= 0) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name+": Letters only please. "; 
                }//if                             
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
            }//if 
            break; 
        }//alpha 
        case "alnumhyphen": {
            var charpos = objValue.value.search("[^A-Za-z0-9\-_]"); 
            if(objValue.value.length > 0 &&  charpos >= 0) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name+": characters allowed are A-Z,a-z,0-9,- and _"; 
                }//if                             
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
            }//if 			
            break;
        }
        case "email": { 
            if(!validateEmailv2(objValue.value)) { 
                if(!strError || strError.length ==0) { 
                    strError = "Please enter a valid Email address "; 
                }//if                                               
                alert(strError); 
                return false; 
            }//if 
            break; 
        }//case email 
        case "lt": 
        case "lessthan": { 
            if(isNaN(objValue.value)) { 
                alert(objValue.name+": Should be a number "); 
                return false; 
            }//if 
            if(eval(objValue.value) >=  eval(cmdvalue)) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name + " : value should be less than "+ cmdvalue; 
                }//if               
                alert(strError); 
                return false;                 
            }//if             
            break; 
        }//case lessthan 
        case "gt": 
        case "greaterthan": { 
            if(isNaN(objValue.value)) { 
                alert(objValue.name+": Should be a number "); 
                return false; 
            }//if 
            if(eval(objValue.value) <=  eval(cmdvalue)) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name + " : value should be greater than "+ cmdvalue; 
                }//if               
                alert(strError); 
                return false;                 
            }//if             
            break; 
        }//case greaterthan 
        case "regexp": { 
            if(objValue.value.length > 0) {
                if(!objValue.value.match(cmdvalue)) { 
                    if(!strError || strError.length ==0) { 
                        strError = objValue.name+": Invalid characters found "; 
                    }//if                                                               
                    alert(strError); 
                    return false;                   
                }//if 
            }
            break; 
        }//case regexp 
        case "dontselect": { 
            if(objValue.selectedIndex == null) { 
                alert("BUG: dontselect command for non-select Item"); 
                return false; 
            } 
            if(objValue.selectedIndex == eval(cmdvalue)) { 
                if(!strError || strError.length ==0) { 
                    strError = objValue.name+": Please Select one option "; 
                }//if                                                               
                alert(strError); 
                return false;                                   
            } 
            break; 
        }//case dontselect 
    }//switch 
    return true; 
}