js几个验证函数

太过爱你忘了你带给我的痛 2022-04-01 14:29 172阅读 0赞

1  // 检查是否非空   
  2   function  notEmpty(obj, msg)  
  3  \{  
  4  str  =  obj.value;  
  5  str1  =  "" ;  
  6  for  (i  =  0 ; i  <  str.length; i \++ )  
  7  \{  
  8  if  (str.charAt(i)  !=  "  " )  
  9  \{  
 10  str1  =  str.substr(i, str.length);  
 11  break ;  
 12  \}  
 13  \}  
 14   
 15  if  (str1  ==  "" )  
 16  \{  
 17  alert(msg);  
 18  obj.value  =  "" ;  
 19  obj.focus();  
 20  return  false ;  
 21  \}  
 22  else   
 23  \{  
 24  return  true ;  
 25  \}  
 26  \}  
 27   
 28  // 检查是否为数字   
 29   function  isNumber(obj, msg)  
 30  \{  
 31  if (isNaN(obj.value))  
 32  \{  
 33  if  (undefined  ==  msg)  
 34  \{  
 35  msg  =  " 请输入数字！ " ;  
 36  \}  
 37   
 38  alert(msg);  
 39  obj.select();  
 40  return  false ;  
 41  \}  
 42  else   
 43  \{  
 44  return  true ;  
 45  \}  
 46  \}  
 47   
 48  // 检查密码是否相同   
 49   function  isSamePwd(objPwd1, objPwd2, msg)  
 50  \{  
 51  pwd1  =  objPwd1.value;  
 52  pwd2  =  objPwd2.value;  
 53   
 54  if  (pwd1  !=  pwd2)  
 55  \{  
 56  if  ( null  ==  msg)  
 57  \{  
 58  alert( " 密码不相同！ " );  
 59  \}  
 60  else   
 61  \{  
 62  alert(msg);  
 63  \}  
 64   
 65  objPwd2.value  =  "" ;  
 66  objPwd2.focus();  
 67  return  false ;  
 68  \}  
 69  else   
 70  \{  
 71  return  true ;  
 72  \}  
 73  \}  
 74   
 75  // 检查邮件地址   
 76   function  isEmail(obj, msg)  
 77  \{  
 78  ch  =  obj.value;  
 79  if ((ch.indexOf( " @ " )  <  1 )  ||  (ch.indexOf( " . " )  <  1 )  ||  (ch.indexOf( " . " )  ==  ch.length  \-  1 ))  
 80  \{  
 81  if  ( null  ==  msg)  
 82  \{  
 83  alert( " Email不正确！ " );  
 84  \}  
 85  else   
 86  \{  
 87  alert(msg);  
 88  \}  
 89  obj.select();  
 90  return  false ;  
 91  \}  
 92  else   
 93  \{  
 94  return  true ;  
 95  \}  
 96  \}

< script language = " javascript " >   
 function  checkspace(checkstr) \{  
 var  str  =  '' ;  
 for (i  =  0 ; i  <  checkstr.length; i \++ ) \{  
str  =  str  \+  '  ' ;  
\}  
 return  (str  ==  checkstr);  
\}  
  
 function  checkfrm()  
\{  
  
  
 if  (checkspace(document.frm.title.value))  
\{  
alert( ' 标题不能为空 ' );  
document.frm.title.focus();  
 return  false ;  
\}  
  
 if  (checkspace(document.frm.truename.value))  
\{  
alert( " 姓名必须填写 " );  
document.frm.truename.focus();  
 return  false ;  
\}  
  
 if  (checkspace(document.frm.danwei.value))  
\{  
alert( " 单位名称没有填写 " );  
document.frm.dianwei.focus();  
 return  false ;  
\}  
  
 if  (checkspace(document.frm.dizhi.value))  
\{  
alert( " 地址不能为空 " );  
document.frm.dizhi.focus();  
 return  false ;  
\}  
  
 if  (checkspace(document.frm.content.value))  
\{  
alert( " 留言内容部能为空 " );  
document.frm.content.focus();  
 return  false ;  
\}  
 if  (checkspace(document.frm.email.value))  
\{  
alert( " 邮箱不能为空 " );  
document.frm.email.focus();  
 return  false ;  
\}  
  
 return  true ;  
\}  
 < / script>