function preload(){
	image1=new Image();
	image2=new Image();
	image3=new Image();
	image4=new Image();
	image5=new Image();
	image6=new Image();
	image7=new Image();
	image8=new Image();
	image9=new Image();
	
	image1.src="images/nav_on_02.jpg";
	image2.src="images/nav_on_03.jpg";
	image3.src="images/nav_on_04.jpg";
	image4.src="images/nav_on_05.jpg";
	image5.src="images/nav_on_06.jpg";
	image6.src="images/nav_on_07.jpg";
	image7.src="images/nav_on_08.jpg";
	image8.src="images/nav_on_09.jpg";
	image9.src="images/nav_on_10.jpg";
}

function validateField(fieldId,validator){
	var result_field=document.getElementById(validator);
	if (document.getElementById(fieldId).value.trim()==""){
		result_field.innerHTML="invalid";
		result_field.style.color="red";
	}else{
		result_field.innerHTML="OK";
		result_field.style.color="lime";
	}
}

function validateEmail(fieldId,validator){
	var result_field=document.getElementById(validator);
	var filter = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(document.getElementById(fieldId).value)==false){
		result_field.innerHTML="Invalid";
		result_field.style.color="red";
	}else{
		result_field.innerHTML="OK";
		result_field.style.color="lime";
	}
}

function sendEmail(strURL) {
    var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    email=document.getElementById('email').value;
    sender=document.getElementById('name').value;
    subject=document.getElementById('subject').value;
    message=document.getElementById('message').value;
    
    strURL+="&email="+email+"&sender="+sender+"&subject="+subject+"&message="+message;
    alert(strURL);
    self.xmlHttpReq.open('GET', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {
        if (self.xmlHttpReq.readyState == 4) {
            updatepage(self.xmlHttpReq.responseText);
        }
    }
}

function updatepage(str){
    document.getElementById("email_result").innerHTML = str;
}