JS选择和验证技术

<input type="checkbox" name="nickName" value="${black.nickname}" />
<a href="#" onclick="javascript:selAllCheckbox('nickName');">全部</a>
<a href="#" onclick="javascript:unselAllCheckbox('nickName');">不选</a>
<a href="#" onclick="javascript:reAllCheckbox('nickName');">反选</a>
/*全选*/
function selAllCheckbox(checkboxName) {
o = document.getElementsByName(checkboxName);
for (i = 0; i < o.length; i++) {
o[i].checked = true;
}
}
/*取消全选*/
function unselAllCheckbox(checkboxName) {
o = document.getElementsByName(checkboxName);
for (i = 0; i < o.length; i++) {
o[i].checked = false;
}
}
/*取消全选*/
function reAllCheckbox(checkboxName) {
o = document.getElementsByName(checkboxName);
for (i = 0; i < o.length; i++) {
if (o[i].checked == false) {
o[i].checked = true;
} else {
o[i].checked = false;
}
}
}
/*是否选中*/
function isChecked(name) {
var temp = document.getElementsByName(name);
for (i = 0; i < temp.length; i=i+1) {
if (temp[i].checked) {
return true;

}
}
}
//计算字符串的长度
function checkStrLength(value) {
var StrTrueLength = value.replace(/[^/x00-/xff]/g, "~~").length;
return StrTrueLength;
}
/*判断是否为数字*/
function isNumber(str) {
var Letters = "1234567890";
for (var i = 0; i < str.length; i = i + 1) {
var CheckChar = str.charAt(i);
if (Letters.indexOf(CheckChar) == -1) {
return false;
}
}
return true;
}
/*判断是否为Email*/
function isEmail(str) {
var myReg = /^[-_A-Za-z0-9]+@([_A-Za-z0-9]+/.)+[A-Za-z0-9]{2,3}$/;
if (myReg.test(str)) {
return true;
}
return false;
}
/*返回check选中数*/
function getCheckedCount(checkboxName) {
o = document.getElementsByName(checkboxName);
var c = 0;
for (i = 0; i < o.length; i++) {
if (o[i].checked == true) {
c++;
}
}
return c;
}
/*判断身份证是否正确*/
function JustifyIdCard( theField ) {

var reg =/(^(/d{15}|/d{17}[/dx])$)/;
if (reg.test(theField)){
return true;
}else{
return false;
}
}
/*判断用户名是否正确*/
function JustifyUserName( theField ) {
var reg =/^(/w+)|([/u0391-/uFFE5]+)$/;
if (reg.test(theField)){
return true;
}else{
return false;
}
}
/*比较两个时间的大小*/
function CompareDate(d1,d2)
{
  return ((new Date(d1.replace(/-/g,"//"))) > (new Date(d2.replace(/-/g,"//"))));
}
//根据身份证生成生日
function addBirthday(){
var str=document.getElementById('idCard').value;//身份证编码
var birthday=document.getElementById('birthday');
　　 var len=str.length;//身份证编码长度
if (len==18){
　　 birthday.value=str.substr(6,4)+'-'+str.substr(10,2)+'-'+str.substr(12,2);
　 }
if (len==15){
　　 birthday.value="19"+str.substr(6,2)+'-'+str.substr(8,2)+'-'+str.substr(10,2);
　 }
}