function echeck(str) {

	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	   //alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   //alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		//alert("Invalid E-mail ID")
		return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
		//alert("Invalid E-mail ID")
		return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		//alert("Invalid E-mail ID")
		return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
		//alert("Invalid E-mail ID")
		return false
	 }
	
	 if (str.indexOf(" ")!=-1){
		//alert("Invalid E-mail ID")
		return false
	 }

	 return true					
}

function validate_register() {
	
	// first_name
	if (document.getElementById("first_name").value.length < 1) {
		alert("Please enter a valid first name.");
		document.getElementById("first_name_label").style.color = "red";
		document.getElementById("first_name").focus();
		return false;
	} else {
		document.getElementById("first_name_label").style.color = "black";
	}
	
	// last_name
	if (document.getElementById("last_name").value.length < 1) {
		alert("Please enter a valid last name.");
		document.getElementById("last_name_label").style.color = "red";
		document.getElementById("last_name").focus();
		return false;
	} else {
		document.getElementById("last_name_label").style.color = "black";
	}
	
	// email_1 (validate)
	if (echeck(document.getElementById("email_1").value) == false) {
		alert("Please enter a valid email address.");
		document.getElementById("email_1_label").style.color = "red";
		document.getElementById("email_1").focus();
		return false;
	} else {
		document.getElementById("email_1_label").style.color = "black";
	}
	
	// email_2
	if (document.getElementById("email_2").value != document.getElementById("email_1").value) {
		alert("Please make sure the email addresses are the same.");
		document.getElementById("email_2_label").style.color = "red";
		document.getElementById("email_2").focus();
		return false;
	} else {
		document.getElementById("email_2_label").style.color = "black";
	}
	
	/*if (!document.getElementById("agree").checked) {
		alert("Please read our terms and conditions and tick the checkbox if you agree with them.");
		return false;
	}*/
			
	if (document.getElementById('result').innerHTML != 'PASS') {
		//getParam(document.getElementById('request'));
		alert("Please enter the exact code on the image into the text box and click the SECURITY CHECK link.");
		document.getElementById("txtCaptcha").focus();
		return false;
	}
	
}

function validate_enquire() {
	
	// title
	if (document.getElementById("title").value == 'select') {
		alert("Please select a title.");
		document.getElementById("title_label").style.color = "red";
		document.getElementById("title").focus();
		return false;
	} else {
		document.getElementById("title_label").style.color = "black";
	}
	
	// first_name
	if (document.getElementById("first_name").value.length < 1) {
		alert("Please enter a valid first name.");
		document.getElementById("first_name_label").style.color = "red";
		document.getElementById("first_name").focus();
		return false;
	} else {
		document.getElementById("first_name_label").style.color = "black";
	}
	
	// last_name
	if (document.getElementById("last_name").value.length < 1) {
		alert("Please enter a valid last name.");
		document.getElementById("last_name_label").style.color = "red";
		document.getElementById("last_name").focus();
		return false;
	} else {
		document.getElementById("last_name_label").style.color = "black";
	}
	
	// email_1 (validate)
	if (echeck(document.getElementById("email_1").value) == false) {
		alert("Please enter a valid email address.");
		document.getElementById("email_1_label").style.color = "red";
		document.getElementById("email_1").focus();
		return false;
	} else {
		document.getElementById("email_1_label").style.color = "black";
	}
	
	// email_2
	if (document.getElementById("email_2").value != document.getElementById("email_1").value) {
		alert("Please make sure the email addresses are the same.");
		document.getElementById("email_2_label").style.color = "red";
		document.getElementById("email_2").focus();
		return false;
	} else {
		document.getElementById("email_2_label").style.color = "black";
	}

	// message
	if (document.getElementById("message").value == '') {
		alert("Please enter a valid message.");
		document.getElementById("message_label").style.color = "red";
		document.getElementById("message").focus();
		return false;
	} else {
		document.getElementById("message_label").style.color = "black";
	}
	
	if (!document.getElementById("agree").checked) {
		alert("Please read our terms and conditions and tick the checkbox if you agree with them.");
		return false;
	}
	
	if (document.getElementById('result').innerHTML != 'PASS') {
		//getParam(document.getElementById('request'));
		alert("Please enter the exact code on the image into the text box and click the SECURITY CHECK link.");
		document.getElementById("txtCaptcha").focus();
		return false;
	}
	
}

function changeImage(img_src) {
	//document.write(img_src);
	document['main_image'].src = img_src;
}