Javascript客户端验证常用函数
2007-03-29 15:22 Rainbow 阅读(1269) 评论(0) 编辑 收藏 举报function validNull(theId,msg)
{
if(document.getElementById(theId).value == "")
{
window.alert(msg);
document.getElementById(theId).focus();
return false;
}
return true;
}
//某控件不能为某值
function validCant(theId,theValue,msg)
{
if(document.getElementById(theId).value == theValue)
{
window.alert(msg);
document.getElementById(theId).focus();
return false;
}
return true;
}
//Email格式验证
function validEmail(theId,msg)
{
var email = /^[_a-zA-Z0-9+.]+@([_a-zA-Z0-9]+.)+[a-zA-Z0-9]{2,3}$/;
if(email.test(document.getElementById(theId).value))
{
return true;
}
else
{
window.alert(msg);
document.getElementById(theId).focus();
return false;
}
}
//密码验证,不能包含特殊字符<>"'和空格
function validPassword(theId,msg)
{
var reg = /^[^<>'" ]*$/;
if(reg.test(document.getElementById(theId).value))
{
return true;
}
else
{
window.alert(msg);
document.getElementById(theId).focus();
return false;
}
}
//整数验证
function validInt(theId)
{
var myInt = /^d*$/;
if(myInt.test(document.getElementById(theId).value))
{
return true;
}
else
{
window.alert(msg);
document.getElementById(theId).focus();
return false;
}
}
//两值比较
function validCompare(theId1,theId2,msg)
{
if(document.getElementById(theId1).value == document.getElementById(theId2).value)
{
return true;
}
else
{
window.alert(msg);
document.getElementById(theId1).focus();
return false;
}
}
//字段长度验证(x位至y位)
function validLength(theId,x,y,msg)
{
if(document.getElementById(theId).value.length < x || document.getElementById(theId).value.length > y)
{
window.alert(msg);
document.getElementById(theId).focus();
return false;
}
return true;
}
/* 描述: 验证日期 格式####-## */
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changeValue (obj,type)
描述:输入字符的控制
说明:
obj:需检查的客户端控件
type:输入类型
{normal: 包含数字、字母、汉字、下载线、中划线、()}
{integer:包含数字}
{decimal:包含数字、小数点}
{extend: 包含数字、字母、下载线、中划线、()}
{date: 包含数字、中划线}
{email: 包含数字、汉字、下划线、中划线、小数点、@}
样例:
1) 邮件格式检测
<input type=”button” name=”txtMail” onKeyup=”changeValue(this,’email’);” >
2) 日期格式检测
<input type=”button” name=”txtDate” onKeyup=”changeValue(this,’date’);” >
3) 浮点数检测
<input type=”button” name=”txtNumber” onKeyup=”changeValue(this,’decimal’);” >
blurValue(obj,type,length,prec)
描述:失去焦点后,检查输入是否正确
说明:
obj:需检查的客户端控件
type:输入类型
{decimal:验证输入值是否是浮点数及格式化浮点数、检查长度}
{date:验证输入值是否是日期格式及格式化日期但无需检查长度}
{email:验证输入值是否是email格式、检查长度}
{nullmode:仅检查输入值的长度}
length:最大输入长度
prec:小数位精度,默认2位
样例:
1) 浮点数
<input type=”button” name=”txtMail” onBlur=”blurValue(this,’decimal’,10,3);” >
2) 日期
<input type=”button” name=”txtDate” onBlur=”blurValue(this,’date’);” >
3) 邮件地址
<input type=”button” name=”txtMail” onBlur=”blurValue(this,’email’,20);” >
4) 仅检测长度
<input type=”button” name=”txt1” onBlur=”blurValue(this,’nullmode’,20);” >
注:changValue与blurValue配合使用
如果是浮点数检测还要与restoreFormat配合使用
restoreFormat(obj)
描述:恢复浮点数显示
说明:内部函数,将格式化过的数据赋给obj.value对象
样例:<input type=”button”name=”txt1” onFocus=”restoreFormat(this);”>
另外在Asp.Net中调用方法如下: txtCJG.Attributes("onblur") = "javascript:blurValue(this,'cbo','cboCJG');"
txtCBSYR.Attributes("onkeyup") = "javascript:changeValue(this,'normal');"
txtCBSYR.Attributes("onblur") = "javascript:blurValue(this,'nullmode',80);"