//检查必填项
function CheckNotNull(objField, strText) {
  if (Trim(objField.value) == "") {
    alert("请填写“" + strText + "”！");
    objField.focus();
    return false;
  }
  return true;
}

//去除字符串左端空格
function LTrim(str) {
  return str.replace(/^\s*/, '');
}

//去除字符串右端空格
function RTrim(str) {
  return str.replace(/\s*$/, '');
}

//去除字符串两端空格
function Trim(str) {
  return LTrim(RTrim(str));
}

//检测为短日期
function CheckDate(objField, strText)
{
    var objValue = Trim(objField.value);
    if (objValue=="") return true;
	var strErr = "“" + strText + "”不是正确的日期格式(例：2007-10-1)！";
    var r = objValue.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/); 
    if( r==null) {
		alert(strErr);
        objField.focus();
	    return false; 
	}
	var d= new Date(r[1], r[3]-1, r[4]); 
	var B = d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4];
    if( !B )
	{
		alert(strErr);
        objField.focus();
	    return false; 
	}
	return true;
}

//检测为身份证号
function CheckIDCardNo(objField, strText)
{
    var objValue = Trim(objField.value);
    if (objValue=="") return true;
	var len = objValue.length, re; 
	if (len == 15)
		re = new RegExp(/^(\d{6})()?(\d{2})(\d{2})(\d{2})(\d{3})$/);
	else if (len == 18)
	{
	    re = new RegExp(/^(\d{6})()?(\d{4})(\d{2})(\d{2})(\d{3})(\d{3})$/);
	}
	else {
	   alert("“" + strText + "”输入的数字位数不正确！"); 
       objField.focus();
       return false;
	}
	var a = objValue.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("“" + strText + "”输入的身份证号 "+ a[0] +" 内出生日期不正确！"); 
			objField.focus();
            return false;
		}
	}
	return true;
}