//**********************//
//** arama kutu kontrol //

function search_form_onsubmit() {
	
	if (search_form.strSearch.value.length<3) {
		alert('Please specify at least 3 letters to start search process!');
		document.search_form.strSearch.focus(); 
		return false;
		}

	if (search_form.strSearch.value == "Site search") {
		alert("Please specify a word to start search process!");
		document.search_form.strSearch.focus(); 
		return false;
		}
}


//********************//
//** kutu kontrol //

function clearField(field) {
	if (field.value == field.defaultValue) {
	field.value = "";
	}
}	
function checkField(field) {
	if (field.value == "") {
	field.value = field.defaultValue;
	}
}


//**************//
// buton disable

function disableButton(theButton)
	{
	 theButton.value="İşleminiz yapılıyor...";
	 theButton.disabled = true;
	 theButton.form.submit();
	}


//*******************//
//** pop-up scripti //

function MM_openBrWindow(theURL,winName,w,h,scrollbars) 
	{ 
		LeftPosition=(screen.width)?(screen.width-w)/2:100;
		TopPosition=(screen.height)?(screen.height-h)/2:100;
  
		settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scrollbars+',location=no,directories=no,status=0,menubar=no,toolbar=no,resizable=no';
		URL = theURL;
		window.open(URL,winName,settings);
	}


//*******************//
// show hide div kontrolu

function show_hide_menu (ID){
  	var hiddenrow = document.getElementById(ID);
  	if (hiddenrow.style.display == "none")
  		{hiddenrow.style.display = "block";}
  	else 
  		{hiddenrow.style.display = "none";}
	}


//***********************//
// form check core kodlari

function fieldchecker(fieldname,formname){
	if(!formname) formname = "0";
	if(document.forms[formname].elements[fieldname].value.replace(/^\s*|\s*$/g,"") == ""){
		document.forms[formname].elements[fieldname].focus();
		return false;}
	return true;}

function radiochecker(fieldname,formname) {
	if(!formname) formname = "0"; 
	for (var i = 0; i < document.forms[formname].elements[fieldname].length; i++) { var e = document.forms[formname].elements[fieldname][i];
		if(e.checked) {return true;}
		}
	return false;}

function emailCheck (formName,emailStr) {
	emailStr = document.forms[formName].elements[emailStr].value;
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
		alert("Your e-mail address does not seen valid! (Please check @ and . signs)")
		return false
	}
	var user=matchArray[1]
	var domain=matchArray[2]
	if (user.match(userPat)==null) {
		alert("Your e-mail address username part does not seen valid!")
		return false
	}
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		  for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("Your IP address does not seen valid!")
			return false
			}
		}
		return true
	}
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		alert("Your e-mail address does not seen valid!")
		return false
	}
	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || 
		domArr[domArr.length-1].length>3) {
	   alert("Your e-mail address should end with 3 letter domain name or 2 letter country code!")
	   return false
	}
	if (len<2) {
	   var errStr="Your e-mail address is not valid!"
	   alert(errStr)
	   return false
	}
	return true;
}

isNS=(document.layers || (document.getElementById && !document.all)) ? true : false;

function onlyNumber(e) {
var keyCode = (isNS) ? e.which : e.keyCode;
if ((keyCode<48 || keyCode>57)&&keyCode!=8&&keyCode!=0&&keyCode!=44){
	return false;}
	}


//********************//
// iletisim formu kontolu

function check_contact_form()
	{
	
	if(!fieldchecker("sender","contact_form")){ alert("Please specify your name and surname!"); return false};
	if(!fieldchecker("email","contact_form")){ alert("Please specify your e-mail address!"); return false};
	if(!emailCheck("contact_form","email")){ return false};
	if(!fieldchecker("subject","contact_form")){ alert("Please specify message subject"); return false};
	if(!fieldchecker("message","contact_form")){ alert("Please specify message content"); return false};
	return true;
	}