实用的JS表单验证提示效果_表单特效

来源：优察财经网

errMsg 是一个错误消息的数组，这样方便自定义,errName是对应错误信息元件名数组，这样可以非富自定义显示方式，FormValid.allName记录了所有有验证规则的字段名数级，在自定义中可以使用到。

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<title>表单验证提示效果</title> 
<style type="text/css"> 
body{ color:#666666; font-size:12px} 
h1{ font-size:20px;} 
input{ border:#999999 1px solid; background-color:#FFFFEE} 
.button2{ background-color:#FF9900; border-bottom:#E34A00 2px solid;border-right:#E34A00 2px solid; border-top:#FFB693 2px solid;border-left:#FFB693 2px solid; color:#FFFFFF; font-weight:bold} 
dl { 
font:normal 12px/15px Arial; 
position: relative; 
width: 350px; 
} 
dt { 
clear: both; 
float:left; 
width: 80px; 
padding: 4px 0 2px 0; 
text-align: left; 
} 
dd { 
float: left; 
width: 200px; 
margin: 0 0 8px 0; 
padding-left: 6px; 
}

.hint { 
display: none; 
position: absolute; 
right: -160px; 
width: 200px; 
margin-top: -4px; 
border: 1px solid #c93; 
padding: 10px 12px; 
background: #ffc url(/upload/2009-11/20091104144511488.gif) no-repeat -10px 5px; 
}

.hint .hint-pointer { 
position: absolute; 
left: -10px; 
top: 5px; 
width: 10px; 
height: 19px; 
background: url(/upload/2009-11/20091104144511488.gif) left top no-repeat; 
} 
</style> 
 
var FormValid = function(frm) { 
this.frm = frm; 
this.errMsg = new Array(); 
 this.errName = new Array();

this.required = function(inputObj) { 
if (typeof(inputObj) == "undefined" || inputObj.value.trim() == "") { 
return false; 
} 
 return true; 
}

this.eqaul = function(inputObj, formElements) { 
 var fstObj = inputObj; 
 var sndObj = formElements[inputObj.getAttribute('eqaulName')]; 
 
if (fstObj != null && sndObj != null) { 
if (fstObj.value != sndObj.value) { 
return false; 
} 
} 
 return true; 
}

this.gt = function(inputObj, formElements) { 
 var fstObj = inputObj; 
 var sndObj = formElements[inputObj.getAttribute('eqaulName')]; 
 
if (fstObj != null && sndObj != null && fstObj.value.trim()!='' && sndObj.value.trim()!='') { 
if (fstObj.value <= sndObj.value) { 
return false; 
} 
} 
 return true; 
}

this.compare = function(inputObj, formElements) { 
 var fstObj = inputObj; 
 var sndObj = formElements[inputObj.getAttribute('objectName')]; 
if (fstObj != null && sndObj != null && fstObj.value.trim()!='' && sndObj.value.trim()!='') { 
if (!eval('fstObj.value' + inputObj.getAttribute('operate') + 'sndObj.value')) { 
return false; 
} 
} 
 return true; 
 } 
 
 this.limit = function (inputObj) { 
 var len = inputObj.value.length; 
 if (len) { 
 var minv = inputObj.getAttribute('min'); 
 var maxv = inputObj.getAttribute('max'); 
 minv = minv || 0; 
 maxv = maxv || Number.MAX_VALUE; 
 return minv <= len && len <= maxv; 
 } 
 return true; 
 } 
 
 this.range = function (inputObj) { 
 var val = parseInt(inputObj.value); 
 if (inputObj.value) { 
 var minv = inputObj.getAttribute('min'); 
 var maxv = inputObj.getAttribute('max'); 
 minv = minv || 0; 
 maxv = maxv || Number.MAX_VALUE; 
 
 return minv <= val && val <= maxv; 
 } 
 return true; 
 } 
 
 this.requireChecked = function (inputObj) { 
 var minv = inputObj.getAttribute('min'); 
 var maxv = inputObj.getAttribute('max'); 
 minv = minv || 1; 
 maxv = maxv || Number.MAX_VALUE; 
 
 var checked = 0; 
 var groups = document.getElementsByName(inputObj.name); 
 
 for(var i=0;i<groups.length;i++) { 
 if(groups[i].checked) checked++; 
 
 } 
 return minv <= checked && checked <= maxv; 
 } 
 
 this.filter = function (inputObj) { 
 var value = inputObj.value; 
 var allow = inputObj.getAttribute('allow'); 
 if (value.trim()) { 
 return new RegExp("^.+\.(?=EXT)(EXT)$".replace(/EXT/g, allow.split(/\s*,\s*/).join("|")), "gi").test(value); 
 } 
 return true; 
 } 
 
 this.isNo = function (inputObj) { 
 var value = inputObj.value; 
 var noValue = inputObj.getAttribute('noValue'); 
 return value!=noValue; 
 } 
this.checkReg = function(inputObj, reg, msg) { 
inputObj.value = inputObj.value.trim();

if (inputObj.value == '') { 
return; 
} else { 
if (!reg.test(inputObj.value)) { 
 this.addErrorMsg(inputObj.name,msg); 
 } 
} 
}

this.passed = function() { 
if (this.errMsg.length > 0) { 
FormValid.showError(this.errMsg,this.errName); 
frt = document.getElementsByName(this.errName[0])[0]; 
 
 if (frt.type!='radio' && frt.type!='checkbox') { 
 frt.focus(); 
 } 
return false; 
} else { 
return true; 
} 
}

this.addErrorMsg = function(name,str) { 
this.errMsg.push(str); 
 this.errName.push(name); 
} 
 
this.addAllName = function(name) { 
 FormValid.allName.push(name); 
} 
 
} 
FormValid.allName = new Array(); 
FormValid.showError = function(errMsg) { 
 var msg = ""; 
 for (i = 0; i < errMsg.length; i++) { 
 msg += "- " + errMsg[i] + "\n"; 
 }

alert(msg); 
} 
function validator(frm) { 
 var formElements = frm.elements; 
 var fv = new FormValid(frm); 
 
 for (var i=0; i 
</p> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]