JS必填字段验证

最新推荐文章于 2024-01-31 19:39:23 发布

pdsjay

最新推荐文章于 2024-01-31 19:39:23 发布

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CC 4.0 BY-SA版权

文章标签： javascript email function

本文链接：https://blog.youkuaiyun.com/pdsjay/article/details/6446903

[code=JScript]

<SCRIPT LANGUAGE="JavaScript">
<!--
function check()
{
if(checkspace(document.userinfo.username.value)) {
document.userinfo.username.focus();
alert("用户名不能为空，请重新输入！");
return false;
}
if(checkspace(document.userinfo.username.value) || document.userinfo.username.value.length < 2) {
document.userinfo.username.focus();
alert("用户名长度不能小于2，请重新输入！");
return false;
}
if(checkspace(document.userinfo.identify.value) || document.userinfo.identify.value.length < 15) {
document.userinfo.identify.focus();
alert("身份证号码长度不能小于15位，请重新输入！");
return false;
}
if(checkspace(document.userinfo.identify.value) || document.userinfo.identify.value.length > 18) {
document.userinfo.identify.focus();
alert("身份证号码长度不能大于18位，请重新输入！");
return false;
}
if(checkspace(document.userinfo.UserPassword.value) || document.userinfo.UserPassword.value.length < 6) {
document.userinfo.UserPassword.focus();
alert("密码长度不能小于6，请重新输入！");
return false;
}
if(document.userinfo.UserPassword.value != document.userinfo.UserPassword1.value) {
document.userinfo.UserPassword.focus();
document.userinfo.UserPassword.value = '';
document.userinfo.UserPassword1.value = '';
alert("两次输入的密码不同，请重新输入！");
return false;
}

if(document.userinfo.useremail.value.length!=0)
{
if (document.userinfo.useremail.value.charAt(0)=="." ||
document.userinfo.useremail.value.charAt(0)=="@"||
document.userinfo.useremail.value.indexOf( '@', 0) == -1 ||
document.userinfo.useremail.value.indexOf('.', 0) == -1 ||
document.userinfo.useremail.value.lastIndexOf("@")==document.userinfo.useremail.value.length-1 ||
document.userinfo.useremail.value.lastIndexOf(".")==document.userinfo.useremail.value.length-1)
{
alert("Email地址格式不正确！");
document.userinfo.useremail.focus();
return false;
}
}
else
{
alert("Email不能为空！");
document.userinfo.useremail.focus();
return false;
}

}

function checkspace(checkstr) {
var str = '';
for(i = 0; i < checkstr.length; i++) {
str = str + ' ';
}
return (str == checkstr);
}
//-->
</script>

[/code]