function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
		but_1b = newImage("img/<%=z6%>_over.gif");
		but_2b = newImage("img/<%=z7%>_over.gif");
		but_3b = newImage("img/<%=z8%>_over.gif");
		but_4b = newImage("img/<%=z9%>_over.gif");
		but_5b = newImage("img/<%=z10%>_over.gif");
		but_6b = newImage("img/<%=z11%>_over.gif");
    preloadFlag = true;
  }
}

function openWindow(url) {
	popupWin = window.open(url,'new_page','width=400,height=350,scrollbars=yes')
}

function openPencere(url,w,h,s) {
	popupWin = window.open(url,'new_page','width=' + w + ',height=' + h + ',scrollbars='+ s)
	popupWin.document.write("<html><head><title>ISTANBULTAXITOUR</title></head><body leftmargin=0 topmargin=0 bgcolor=#ffffff><img src="+url+"></body></html>")
}

function formGonder() {

	if (document.rezerve.name.value==""){
			alert(" Error:Name! ")
		return false
	}
	if (document.rezerve.surname.value==""){
			alert(" Error:Surname! ")
		return false
	}
	if (document.rezerve.mail.value==""){
			alert (" Error:E-Mail! ")
		return false
	}
	if (document.rezerve.mail.value.indexOf("@") < 0){
			alert(" Error:E-Mail! ")
		return false
	}
	if (document.rezerve.mail.value.indexOf(".") < 0){
			alert(" Error:E-Mail! ")
		return false
	}
	if (document.rezerve.phone.value==""){
			alert(" Error:Phone! ")
		return false
	}
	if (document.rezerve.tourcode.value=="none"){
			alert(" Error:Tourcode! ")
		return false
	}
	if (document.rezerve.day.value=="none"){
			alert(" Error:Day! ")
		return false
	}
	if (document.rezerve.mounth.value=="none"){
			alert(" Error:Mounth! ")
		return false
	}
	
	if (document.rezerve.year.value=="none"){
			alert(" Error:Year! ")
		return false
	}
	
	if (document.rezerve.hour.value=="none"){
			alert(" Error:Hour! ")
		return false
	}
	
	if (document.rezerve.minute.value=="none"){
			alert(" Error:Minute! ")
		return false
	}
	
	if (document.rezerve.pick.value==""){
			alert(" Error:Pick Up! ")
		return false
	}
	
	if (document.rezerve.drop.value==""){
			alert(" Error:Drop! ")
		return false
	}
	else {
			document.rezerve.submit();
		}
}
