网页设计：Javascript实现的自动验证函数实例

2008-02-23 08:07:42来源：互联网阅读 ()

test.htm

1
2<HTML>
3<HEAD>
4<TITLE> New Document </TITLE>
5 <meta http-equiv="content-type" content="text/html; charset=shift_jis" />
6 <meta http-equiv="pragma" content="no-cache">
7 <meta http-equiv="cache-control" content="no-cache">
8 <meta http-equiv="expires" content="0">
9<script src="common.js"></script>
10<script src="validate.js"></script>
11
12</HEAD>
13
14<BODY>
15<FORM METHOD=POST ACTION="">
16ＩＤ<INPUT TYPE="text" id="txtInt" NAME="txtInt" maxlength="6" feildtype="integer" msg=",<%=IMSG0002%>" ><br>
17ＩＤ<INPUT TYPE="text" id="txtInt" NAME="txtInt" maxlength="6" feildtype="integer" msg=",<%=IMSG0002%>" ><br>
18ＩＤ<INPUT TYPE="text" id="txtInt" NAME="txtInt" maxlength="6" feildtype="integer" msg=",<%=IMSG0002%>" ><br>
19ＩＤ<INPUT TYPE="text" id="txtInt" NAME="txtInt" maxlength="6" feildtype="integer" msg=",<%=IMSG0002%>" ><br>
20
21名称<INPUT TYPE="text" id="txtString" NAME="txtString" maxlength="5" feildtype="string" msg="<%=IMSG0003%>,<%=IMSG0004%>" mustitem="true"><br>
22名称<INPUT TYPE="text" id="txtString" NAME="txtString" maxlength="5" feildtype="string" msg="<%=IMSG0003%>,<%=IMSG0004%>" mustitem="true"><br>
23名称<INPUT TYPE="text" id="txtString" NAME="txtString" maxlength="5" feildtype="string" msg="<%=IMSG0003%>,<%=IMSG0004%>" mustitem="true"><br>
24
25名称2<INPUT TYPE="text" id="txtStr" NAME="txtStr" maxlength="5" feildtype="string" msg="<%=IMSG0003%>,<%=IMSG0004%>" mustitem="true"><br>
26<INPUT TYPE="button" value="submit" onclick="validate(); return false;">
27<SCRIPT LANGUAGE="javascript">
28
31</SCRIPT>
32</FORM>
33</BODY>
34</HTML>
35

validate.js

1function validate(){
2
3 //var objs = document.all;
4 //var Elements = document.getElementsByTagName("*");
5 var Elements;
6 var ctlArray;
7 var ctlArrayName;
8 var i, j;
9 var elLen, arrLen;
10 var msgs;
11
12 Elements = document.getElementsByTagName("input");
13 arrName ="";
14
15 for ( i in Elements ) {
16 elLen = Elements[i].length;
17
18 if (elLen > 1) {
19 ctlArray = Elements[i];
20 arrLen = ctlArray.length;
21
22 if (arrName != ctlArray[0].name) {
23 arrName = ctlArray[0].name;
24
25 for (j=0; j < arrLen; j ) {
26 if (checkValue(ctlArray[j]) == false) {
27 return false;
28 }
29 }
30
31 }
32
33 }else{
34
35 if (checkValue(Elements[i]) == false) {
36 return false;
37 }
38 }
39 }
40
41 return true;
42}
43
44function checkValue (obj){
45
46 var len;
47 len = obj.maxLength;
48
49 if ( obj.type == "text" ) {
50
51 //if (obj.msg != undefined ) {
52 if ( obj.msg ) {
53 msgs = obj.msg.split(",");
54 } else {
55 return true;
56 }
57
58 if ( trim(obj.value) == "" && obj.mustitem && obj.mustitem == "true") {
59 alert(msgs[0]);
60 getFocusSelect(obj);
61 return false;
62 }else {
63
64 if ( trim(obj.value) != ""&& obj.feildtype && obj.feildtype == "integer" ) {
65
66 if ( checkNumLen(obj.value, len) == false ) {
67 alert(msgs[1]);
68 getFocusSelect(obj);
69 return false;
70 }
71
72 } else if ( trim(obj.value) != "" && obj.feildtype && obj.feildtype == "string" ) {
73
74 if ( getLenthByByte(trim(obj.value)) > len){
75 alert(msgs[1]);
76 getFocusSelect(obj);
77 return false;
78 }
79 }
80 }
81 }
82
83}