function sendMail()
{
	

	var name = document.getElementById('name').value;
	var category = document.getElementById('category').value;
	var phone = document.getElementById('phone').value;
	var email = document.getElementById('email').value;
	
	if(category !== '' && email !== '')
	{
		if(EmailCheck(email) !== false)
		{
			var url = 'mail.php?name='+name+'&category='+category+'&phone='+phone+'&email='+email;
			postRequest(url,'resultText');
			
		} else {
			
			document.getElementById('email').focus();
			document.getElementById('resultMessage').innerHTML = 'Invalid Email address!';
			
		}
		
	} else {
		
		document.getElementById('email').focus();
		document.getElementById('resultMessage').innerHTML = 'This fields are required<br/>- Category<br/>-Email';
	}

}

function EmailCheck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		var alerttext = "Invalid E-mail Address"

		if (str.indexOf(at)==-1){

		   return false

		}

}

function postRequest(strsurl,id)
{

	var xmlHttp;
	var resultField = document.getElementById(id);
	if(window.XMLHttpRequest){ // For Mozilla, Safari, ...
	var xmlHttp = new XMLHttpRequest();
	}
	else if(window.ActiveXObject){ // For Internet Explorer
	var xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	}
		xmlHttp.open('POST', strsurl, true);
		xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-surlencoded');
		xmlHttp.onreadystatechange = function(){
		if (xmlHttp.readyState == 4){
		
				resultField.innerHTML = xmlHttp.responseText;
		
		}
	}
	xmlHttp.send(strsurl);

}