- /*
- -------------------------------------------------------------------------
- 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+": Only alphabetic characters allowed ";
- }//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 = objValue.name+": 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;
- }
- /*
- Copyright 2003 JavaScript-coder.com. All rights reserved.
- */