var ValidFone = false;
var CheckQQ = false;
function gid(x) { return document.getElementById(x); } 
function clearMe(x) {	document.getElementById('info_'+x+'_hint').innerHTML = '';}
function IsNumeric(sText) {
   var ValidChars = "0123456789-";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}
function isEmail(email) { 
    invalidChars = " ~\'^\`\"*+=\\|][(){}$&!#%/:,;"; 

    // Check for null 
    if (email == "") { 
        return true; 
    } 

    // Check for invalid characters as defined above 
    for (i=0; i<invalidChars.length; i++) { 
        badChar = invalidChars.charAt(i); 
        if (email.indexOf(badChar,0) > -1) { 
            return false; 
        } 
    } 
    lengthOfEmail = email.length; 
    if ((email.charAt(lengthOfEmail - 1) == ".") || (email.charAt(lengthOfEmail - 2) == ".")) { 
        return false; 
    } 
    Pos = email.indexOf("@",1); 
    if (email.charAt(Pos + 1) == ".") { 
        return false; 
    } 
    while ((Pos < lengthOfEmail) && ( Pos != -1)) { 
        Pos = email.indexOf(".",Pos); 
        if (email.charAt(Pos + 1) == ".") { 
            return false; 
        } 
        if (Pos != -1) { 
            Pos++; 
        } 
    } 

    // There must be at least one @ symbol 
    atPos = email.indexOf("@",1); 
    if (atPos == -1) { 
        return false; 
    } 

    // But only ONE @ symbol 
    if (email.indexOf("@",atPos+1) != -1) { 
        return false; 
    } 

    // Also check for at least one period after the @ symbol 
    periodPos = email.indexOf(".",atPos); 
    if (periodPos == -1) { 
        return false; 
    } 
    if (periodPos+3 > email.length) { 
        return false; 
    } 
    return true; 
} 
function itxt(el,s) {
	thisDiv = document.getElementById(el+'_hint');
	if (thisDiv.style.display != 'block')
		thisDiv.style.display = 'block';
	thisDiv.innerHTML = s;
	/*
	if (!el)
		return;
	var tmpid = el + '_hint';
	else {
		document.getElementById(tmpid).innerHTML = s;
	}*/
}
function emp(id) {
	if (document.getElementById(id).value == '')
		return true;
		/* - removed
	else
		return document.getElementById(id).value;
		*/
}
function postcheck2() {
	if (emp('info_title'))
		itxt('info_title', '请输入标题');
	if (emp('info_contact'))
		itxt('info_contact', '请输入联系方式！');
if (ValidFone == true) {
	if (IsNumeric(gid('info_contact').value)) {
		itxt('info_contact','不是有效的电话号码！');
	}
}
if (CheckQQ == true) {
	if (isNumeric(gid('info_qq').value)) {
		itxt('info_qq','无效QQ号码');
		
	}
}
	if (emp('info_mail'))
		itxt('info_mail','请输入电子邮件地址！');
	if (!emp('info_mail') && !isEmail(gid('info_mail').value))
		itxt('info_mail','无效的email地址！');
	if (emp('info_man'))
		itxt('info_man','发布者不能为空！');
	if (emp('tag1') && emp('tag2') && emp('tag3'))
		itxt('info_tag','请输入至少一个TAG！');
}
function postcheck() {

	if (emp('info_title')) {
		itxt('info_title','请输入标题！');
		return false;
	}
	else if (emp('info_contact')) {
		itxt('info_contact','请输入联系方式！');
		return false;
	}
	else if (!isEmail(gid('info_mail').value)) {
		itxt('info_mail','无效的email地址！');
		return false;
	}
	else if (emp('info_man')) {
		itxt('info_man','发布者不能为空！');
		return false;
	}
	else if (emp('tag1') && emp('tag2') && emp('tag3')) {
		itxt('info_tag','请输入至少一个TAG！');
		return false;
	}
/*	
	else if (emp('info_content')) {
		itxt('info_content','请输入信息内容！');
		return false;
	}
*/	
	else { 
			/*
			** quick fix 07/04/2006 - kast one
			*/
     //dc=document.frames['info_content___Frame'].document.frames[0].document.getElementsByTagName('body')[0].innerHTML; 
    // document.infopost.info_content.value=dc;   
     /* eof quickfix */
     //alert(document.infopost.info_content.value);
     //ajaxFormSubmit(document.infopost,document.getElementById('postArea'));
	 return true;
	 
	}
}
  
	function is_empty (x) { if (document.getElementById(x).value == '') return true; else return false; }
	function showhide(x) {
		var thisID;
		if (x.id.substring(3, 0) == 'tag') 
			thisID = document.getElementById('tag_hint');
		else
			thisID = document.getElementById(x.id + '_hint');
		
		if (thisID.style.display == 'block')
			thisID.style.display = 'none';
		else
			return check(x);
	}
	function err(x) { 
		if (x.substring(3, 0) == 'tag')
			t = document.getElementById('tag_hint');
		else
			t = document.getElementById(x + '_hint');
		if (t && t.style.display != 'block');
			t.style.display = 'block';
//		t.innerHTML = '' 
		if (x == 'info_title')
			t.innerHTML =	'*** 请输入信息标题';
		if (x == 'info_mail')
			t.innerHTML = '*** 请输入电子邮件地址!';
		if (x == 'info_contact')
			t.innerHTML = '*** 请输入您的联系方式!';
		if (x == 'info_man')
			t.innerHTML = '*** 联系人不能为空!';	
/*
		if (x.substring(3, 0) == 'tag') {			
			if (is_empty('tag1') && is_empty('tag2') && is_empty('tag3'))
				t.innerHTML = '*** 请输入至少一个TAG!';
		}
		*/
	}
	function check(x) {
		thisID = document.getElementById(x.id);
			
		if (x.id.substring(3, 0) == 'tag') {			
			if (is_empty('tag1') && is_empty('tag2') && is_empty('tag3'))			
				document.getElementById('tag_hint').style.display = 'block';
				document.getElementById('tag_hint').innerHTML = '*** 请输入至少一个TAG!';
				return;
		}
		if (is_empty(x.id))
			err(x.id);
	}