https://www.honitka.cz/scripts/validator.js

1/*
2  -------------------------------------------------------------------------
3	                    JavaScript Form Validator 
4                                Version 2.0.2
5	Copyright 2003 JavaScript-coder.com. All rights reserved.
6	You use this script in your Web pages, provided these opening credit
7    lines are kept intact.
8	The Form validation script is distributed free from JavaScript-Coder.com
9
10	You may please add a link to JavaScript-Coder.com, 
11	making it easy for others to find this script.
12	Checkout the Give a link and Get a link page:
13	http://www.javascript-coder.com/links/how-to-link.php
14
15    You may not reprint or redistribute this code without permission from 
16    JavaScript-Coder.com.
17	
18	JavaScript Coder
19	It precisely codes what you imagine!
20	Grab your copy here:
21		http://www.javascript-coder.com/
22    -------------------------------------------------------------------------  
23*/
24function Validator(frmname)
25{
26  this.formobj=document.forms[frmname];
27	if(!this.formobj)
28	{
29	  alert("Vnitřní chyba - "+frmname+" není formulář.");
30		return;
31	}
32	if(this.formobj.onsubmit)
33	{
34	 this.formobj.old_onsubmit = this.formobj.onsubmit;
35	 this.formobj.onsubmit=null;
36	}
37	else
38	{
39	 this.formobj.old_onsubmit = null;
40	}
41	this.formobj.onsubmit=form_submit_handler;
42	this.addValidation = add_validation;
43	this.setAddnlValidationFunction=set_addnl_vfunction;
44	this.clearAllValidations = clear_all_validations;
45}
46function set_addnl_vfunction(functionname)
47{
48  this.formobj.addnlvalidation = functionname;
49}
50function clear_all_validations()
51{
52	for(var itr=0;itr < this.formobj.elements.length;itr++)
53	{
54		this.formobj.elements[itr].validationset = null;
55	}
56}
57function form_submit_handler()
58{
59	for(var itr=0;itr < this.elements.length;itr++)
60	{
61		if(this.elements[itr].validationset &&
62	   !this.elements[itr].validationset.validate())
63		{
64		  return false;
65		}
66	}
67	if(this.addnlvalidation)
68	{
69	  /*str =" var ret = "+this.addnlvalidation+"()";
70	  eval(str);
71    if(!ret) return ret;*/
72        return this.addnlvalidation();
73	}
74	return true;
75}
76function add_validation(itemname,descriptor,errstr)
77{
78  if(!this.formobj)
79	{
80	  alert("Vniřní chyba - objekt validátoru není vytvořen.");
81		return;
82	}//if
83	var itemobj = this.formobj[itemname];
84  if(!itemobj)
85	{
86	  alert("Vnitřní chyba - nelze najít objekt: "+itemname);
87		return;
88	}
89	if(!itemobj.validationset)
90	{
91	  itemobj.validationset = new ValidationSet(itemobj);
92	}
93  itemobj.validationset.add(descriptor,errstr);
94}
95function ValidationDesc(inputitem,desc,error)
96{
97  this.desc=desc;
98	this.error=error;
99	this.itemobj = inputitem;
100	this.validate=vdesc_validate;
101}
102function vdesc_validate()
103{
104 if(!V2validateData(this.desc,this.itemobj,this.error))
105 {
106    this.itemobj.focus();
107		return false;
108 }
109 return true;
110}
111function ValidationSet(inputitem)
112{
113    this.vSet=new Array();
114	this.add= add_validationdesc;
115	this.validate= vset_validate;
116	this.itemobj = inputitem;
117}
118function add_validationdesc(desc,error)
119{
120  this.vSet[this.vSet.length]= 
121	  new ValidationDesc(this.itemobj,desc,error);
122}
123function vset_validate()
124{
125   for(var itr=0;itr<this.vSet.length;itr++)
126	 {
127	   if(!this.vSet[itr].validate())
128		 {
129		   return false;
130		 }
131	 }
132	 return true;
133}
134function validateEmailv2(email)
135{
136// a very simple email validation checking. 
137// you can add more complex email checking if it helps 
138    if(email.length <= 0)
139	{
140	  return true;
141	}
142    var splitted = email.match("^(.+)@(.+)$");
143    if(splitted == null) return false;
144    if(splitted[1] != null )
145    {
146      var regexp_user=/^\"?[\w-_\.]*\"?$/;
147      if(splitted[1].match(regexp_user) == null) return false;
148    }
149    if(splitted[2] != null)
150    {
151      var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
152      if(splitted[2].match(regexp_domain) == null) 
153      {
154	    var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
155	    if(splitted[2].match(regexp_ip) == null) return false;
156      }// if
157      return true;
158    }
159return false;
160}
161function V2validateData(strValidateStr,objValue,strError) 
162{ 
163    var epos = strValidateStr.search("="); 
164    var  command  = ""; 
165    var  cmdvalue = ""; 
166    if(epos >= 0) 
167    { 
168     command  = strValidateStr.substring(0,epos); 
169     cmdvalue = strValidateStr.substr(epos+1); 
170    } 
171    else 
172    { 
173     command = strValidateStr; 
174    } 
175    switch(command) 
176    { 
177        case "req": 
178        case "required": 
179         { 
180           if(eval(objValue.value.length) == 0) 
181           { 
182              if(!strError || strError.length ==0) 
183              { 
184                strError = objValue.name + ": Povinná položka"; 
185              }//if 
186              alert(strError); 
187              return false; 
188           }//if 
189           break;             
190         }//case required 
191        case "maxlength": 
192        case "maxlen": 
193          { 
194             if(eval(objValue.value.length) >  eval(cmdvalue)) 
195             { 
196               if(!strError || strError.length ==0) 
197               { 
198                 strError = objValue.name + ": Maximálně "+cmdvalue+" znaků "; 
199               }//if 
200               alert(strError + "\n[Nyní = " + objValue.value.length + " ]"); 
201               return false; 
202             }//if 
203             break; 
204          }//case maxlen 
205        case "minlength": 
206        case "minlen": 
207           { 
208             if(eval(objValue.value.length) <  eval(cmdvalue)) 
209             { 
210               if(!strError || strError.length ==0) 
211               { 
212                 strError = objValue.name + ": Minimálně " + cmdvalue + " znaků  "; 
213               }//if               
214               alert(strError + "\n[Nyní = " + objValue.value.length + " ]"); 
215               return false;                 
216             }//if 
217             break; 
218            }//case minlen 
219        case "alnum": 
220        case "alphanumeric": 
221           { 
222              var charpos = objValue.value.search("[^A-Za-z0-9]"); 
223              if(objValue.value.length > 0 &&  charpos >= 0) 
224              { 
225               if(!strError || strError.length ==0) 
226                { 
227                  strError = objValue.name+": Povoleny jsou pouze alfanumerické znaky "; 
228                }//if 
229                alert(strError + "\n [Chybný znak na pozici " + eval(charpos+1)+"]"); 
230                return false; 
231              }//if 
232              break; 
233           }//case alphanumeric 
234        case "num": 
235        case "numeric": 
236           { 
237              var charpos = objValue.value.search("[^0-9]"); 
238              if(objValue.value.length > 0 &&  charpos >= 0) 
239              { 
240                if(!strError || strError.length ==0) 
241                { 
242                  strError = objValue.name+": Povolena jsou pouze čísla "; 
243                }//if               
244                alert(strError + "\n [Chybný znak na pozici " + eval(charpos+1)+"]"); 
245                return false; 
246              }//if 
247              break;               
248           }//numeric 
249        case "alphabetic": 
250        case "alpha": 
251           { 
252              var charpos = objValue.value.search("[^A-Za-z]"); 
253              if(objValue.value.length > 0 &&  charpos >= 0) 
254              { 
255                  if(!strError || strError.length ==0) 
256                { 
257                  strError = objValue.name+": Povolena jsou pouze písmena "; 
258                }//if                             
259                alert(strError + "\n [Chybný znak na pozici " + eval(charpos+1)+"]"); 
260                return false; 
261              }//if 
262              break; 
263           }//alpha 
264		case "alnumhyphen":
265			{
266              var charpos = objValue.value.search("[^A-Za-z0-9\-_]"); 
267              if(objValue.value.length > 0 &&  charpos >= 0) 
268              { 
269                  if(!strError || strError.length ==0) 
270                { 
271                  strError = objValue.name+": Povolené znaky jsou A-Z,a-z,0-9,- a _"; 
272                }//if                             
273                alert(strError + "\n [Chybný znak na pozici " + eval(charpos+1)+"]"); 
274                return false; 
275              }//if 			
276			break;
277			}
278        case "email": 
279          { 
280               if(!validateEmailv2(objValue.value)) 
281               { 
282                 if(!strError || strError.length ==0) 
283                 { 
284                    strError = objValue.name+": Vyplňte platnou e-mailovou adresu "; 
285                 }//if                                               
286                 alert(strError); 
287                 return false; 
288               }//if 
289           break; 
290          }//case email 
291        case "lt": 
292        case "lessthan": 
293         { 
294            if(isNaN(objValue.value)) 
295            { 
296              alert(objValue.name+": Musí být číslo "); 
297              return false; 
298            }//if 
299            if(eval(objValue.value) >=  eval(cmdvalue)) 
300            { 
301              if(!strError || strError.length ==0) 
302              { 
303                strError = objValue.name + ": číslo musí být menší než "+ cmdvalue; 
304              }//if               
305              alert(strError); 
306              return false;                 
307             }//if             
308            break; 
309         }//case lessthan 
310        case "gt": 
311        case "greaterthan": 
312         { 
313            if(isNaN(objValue.value)) 
314            { 
315              alert(objValue.name+": Musí být číslo "); 
316              return false; 
317            }//if 
318             if(eval(objValue.value) <=  eval(cmdvalue)) 
319             { 
320               if(!strError || strError.length ==0) 
321               { 
322                 strError = objValue.name + ": číslo musí být větší než "+ cmdvalue; 
323               }//if               
324               alert(strError); 
325               return false;                 
326             }//if             
327            break; 
328         }//case greaterthan 
329        case "regexp": 
330         { 
331		 	if(objValue.value.length > 0)
332			{
333	            if(!objValue.value.match(cmdvalue)) 
334	            { 
335	              if(!strError || strError.length ==0) 
336	              { 
337	                strError = objValue.name+": Obsahuje nepovolený znak "; 
338	              }//if                                                               
339	              alert(strError); 
340	              return false;                   
341	            }//if 
342			}
343           break; 
344         }//case regexp 
345        case "dontselect": 
346         { 
347            if(objValue.selectedIndex == null) 
348            { 

349              alert("Vnitřní chyba - kontrola seznamu pro objekt, který není seznam."); 
350              return false; 
351            } 
352            if(objValue.selectedIndex == eval(cmdvalue)) 
353            { 
354             if(!strError || strError.length ==0) 
355              { 
356              strError = objValue.name+": Vyberte jednu možnost "; 
357              }//if                                                               
358              alert(strError); 
359              return false;                                   
360             } 
361             break; 
362         }//case dontselect 
363    }//switch 
364    return true; 
365}
366/*
367	Copyright 2003 JavaScript-coder.com. All rights reserved.
368*/