https://italianrecipes.ca/freecontactformvalidation.js

1// URL: www.freecontactform.com
2// Version: FreeContactForm V2.3
3// Copyright (c) 2019 freecontactform.com
4// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
5// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
6// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
7// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
8// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
9// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
10// THE SOFTWARE.
11function has_id(id){try{var tmp=document.getElementById(id).value;}catch(e){return false;}
12return true;}
13function has_name(nm){try{var tmp=cfrm.nm.type;}catch(e){return false;}
14return true;}
15function $$(id){if(!has_id(id)&&!has_name(id)){alert("Field "+id+" does not exist!\n Form validation configuration error.");return false;}
16if(has_id(id)){return document.getElementById(id).value;}else{return;}}
17function $val(id){return document.getElementById(id);}
18function trim(id){$val(id).value=$val(id).value.replace(/^\s+/,'').replace(/\s+$/,'');}
19var required={field:[],add:function(name,type,mess){this.field[this.field.length]=[name,type,mess];},out:function(){return this.field;},clear:function(){this.field=[];}};var validate={check:function(cform){var error_message='Please fix the following errors:\n\n';var mess_part='';var to_focus='';var tmp=true;for(var i=0;i<required.field.length;i++){if(this.checkit(required.field[i][0],required.field[i][1],cform)){}else{error_message=error_message+required.field[i][2]+' must be supplied\n';if(has_id(required.field[i][0])&&to_focus.length===0){to_focus=required.field[i][0];}
20tmp=false;}}
21if(!tmp){alert(error_message);}
22if(to_focus.length>0){document.getElementById(to_focus).focus();}
23return tmp;},checkit:function(cvalue,ctype,cform){if(ctype=="NOT_EMPTY"){if(this.trim($$(cvalue)).length<1){return false;}else{return true;}}else if(ctype=="EMAIL"){exp=/^[a-zA-Z0-9._%-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;if($$(cvalue).match(exp)==null){return false;}else{return true;}}},trim:function(s){if(s.length>0){return s.replace(/^\s+/,'').replace(/\s+$/,'');}else{return s;}}};