//判断日期格式: MM/DD/YY   MM/DD/YYYY   MM-DD-YY   MM-DD-YYYY
function dateCheck(dateStr) {
	var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/; // requires 4 digit year
	var matchArray = dateStr.match(datePat); // is the format ok?
	if (matchArray == null) {
		return false;
	}
	month = matchArray[1]; // parse date into variables
	day = matchArray[3];
	year = matchArray[4];
	if (month < 1 || month > 12) { // check month range
		return false;
	}
	if (day < 1 || day > 31) {
		return false;
	}
	if ((month==4 || month==6 || month==9 || month==11) && day==31) {
		return false;
	}
	if (month == 2) { // check for february 29th
		var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
		if (day>29 || (day==29 && !isleap)) {
			return false;
	   }
	}
	return true;
}

//判断日期格式: yyyy/mm/dd   YYYY-MM-DD
function isDate(str)
{
	 var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/); 
	 if(r==null)
	 {
	  return false;
	 } 
	 var d= new Date(r[1], r[3]-1, r[4]); 
	 if(!(d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]))
	 {  
	  return false;
	 }
	 return true;
}

//去掉右边空格
String.prototype.Rtrim = function()
{
	return this.replace(/(\s*$)/g, "");
}

//得到字符串的长度(字节数)
String.prototype.len = function()
{
		return this.replace(/[^\x00-\xff]/g,"**").length;
}
 
//判断是否数字
function isDigit(s) 
{ 
	var patrn=/^[0-9]{1,50}$/; 
	if (!patrn.exec(s)) return false 
	return true 
} 

//判断是否有效邮件格式
function verifyAddress(email){ 
	var pattern = /^([a-zA-Z0-9._-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/; 
	flag = pattern.test(email); 
	return flag
}

//判断输入是否为空
//Field:form与需要检测的输入框名称 如: Form1.Title
//msg:提示信息
function checkEmpty(Field,msg)
{
		var re=true;
		var s_pr_Value=eval('document.'+Field+'.value');
		if(s_pr_Value.Rtrim()=="")
		{
			alert(msg);
			eval('document.'+Field+'.focus()');
			re=false;
		}
		return re
}
	
//判断输入是否超过指定长度
//Field:Form与需要检测的输入框名称 如: Form1.Title
//msg:提示信息
function checkLength(Field,msg,MLen)
{
		var re=true;
		var s_pr_Value=eval('document.'+Field+'.value');
		if(s_pr_Value.len()>MLen)
		{
				alert(msg);
				eval('document.'+Field+'.focus()');
				re=false;
		}
		return re
}

//判断是否选择
//Field:Form与需要检测的选择框名称 如: Form1.Title
//msg:提示信息
function checkSelect(Field,msg)
{
		var re=true;
		var s_pr_Value=eval('document.jobForm.'+Field+'.value');
		if(s_pr_Value.Rtrim()=="")
		{
			alert(msg);
			eval('document.'+Field+'.focus()');
			re=false;
		}
		return re
}

//替换函数	
function MyReplace(s,oldStr,str)
{
	 var newStr=s;
	 while(newStr.indexOf(oldStr)>-1)
	  newStr = newStr.replace(oldStr,str);
	 return newStr;
}

//得到输入框的Value
function getValue(Field)
{
	return eval("document."+Field).value;
}

//限制输入字符长度
function textCounter(field,maxlimit) 
{
    var re=0;
    var str="";
    str=field.value;
    str=str.replace(/[^\x00-\xff]/g,"**"); 
    if (str.length > maxlimit)
    {
        field.value=getByteOfNum(field.value,maxlimit);
        re=0;
    }
    else
    {
        re=parseInt((maxlimit-str.length)/2)
    }
    
    return re;
}

//截取字符长度
function getByteOfNum(val, num)
{
    var ch,bytenum=0;
    var rs = "";
    var pt = /[^\x00-\xff]/;
    for (var i=0; i < num; i++)
    {
        ch = val.substr(i, 1);
        if (ch.match(pt))
        {
            bytenum += 2;
            if (bytenum > num)
            {
                return rs;
            }
        }
        else
        {
            bytenum += 1;
        }
        rs += ch;
        if (bytenum == num)
        {
            return rs;
        }
    }
          
    return rs;
}

//判断是否有效的Email格式
function IsEmail(s)
{
     if   (s.length   >   100)   
                return   false;   
        var   regu="^(([0-9a-zA-Z]+)|([0-9a-zA-Z]+[_.0-9a-zA-Z-]*[_.0-9a-zA-Z]+))@([a-zA-Z0-9-]+[.])+([a-zA-Z]{2}|net|NET|com|COM|gov|GOV|mil|MIL|org|ORG|edu|EDU|int|INT)$";       
      var   re   =   new   RegExp(regu);   
                    if   (s.search(re)   !=   -1)   
                              return   true;   
                      else     
                            return   false;   

}
//窗口打开
function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}
//窗口链接新打开
function MM_jumpNewLink(targ,selObj,restore){ //v3.0
 eval("window.open('"+selObj.options[selObj.selectedIndex].value+"');");
 if (restore) selObj.selectedIndex=0;
}