![](https://csdnimg.cn/release/download_crawler_static/87470398/bg7.jpg)
var len = num.length, re;
if (len == 15)
re = new RegExp(/^(\d{6})()?(\d{2})(\d{2})(\d{2})(\d{3})$/);
else if (len == 18)
re = new RegExp(/^(\d{6})()?(\d{4})(\d{2})(\d{2})(\d{3})(\d)$/);
else {alert(" 输入的数字位数不对!"); return false;}
var a = num.match(re);
if (a != null)
{
if (len==15)
{
var D = new Date("19"+a[3]+"/"+a[4]+"/"+a[5]);
var B = D.getYear()==a[3]&&(D.getMonth()+1)==a[4]&&D.getDate()==a[5];
}
else
{
var D = new Date(a[3]+"/"+a[4]+"/"+a[5]);
var B = D.getFullYear()==a[3]&&(D.getMonth()+1)==a[4]&&D.getDate()==a[5];
}
if (!B) {alert(" 输入的身份证号 "+ a[0] +" 里出生日期不对!"); return false;}
}
return true;
}
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3.7 复选框的全选,多选,全不选,反选
全选
全选
function checkAll(str)
{
var a = document.getElementsByName(str);
var n = a.length;
for (var i=0; ia[i].checked = window.event.srcElement.checked;
}
function checkItem(str)
{
var e = window.event.srcElement;
var all = eval("document.hrong."+ str);
if (e.checked)
{
var a = document.getElementsByName(e.name);
all.checked = true;
for (var i=0; i{
if (!a[i].checked){ all.checked = false; break;}
}
}
else all.checked = false;
}
3.8 文件上传过程中判断文件类型
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1.身份证严格验证: