function sendMail(){

	var name = document.contact.name.value;
	var email = document.contact.email.value;
	var topic = document.contact.topic.value;
	var messageTitle = document.contact.messageTitle.value;
	var messageText = document.contact.messageText.value;
	var chkmail =/^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	if(name=='' || name=='Name*' ){
		alert('Name field is required');
		document.contact.name.value='Name*';
		return false;
	}
	else if(email=='' || email=='Email*'){
		alert('Email field is required');
		document.contact.email.value='Email*'
		return false;
	}
	else if(email.search(chkmail) == -1){
		alert("Please enter valid email");
		return false;
	}
	else if(topic=='' || topic=='Topic*'){
		alert('Topic field is required');
		document.contact.topic.value='Topic*';
		return false;
	}
	else if(messageTitle=='' || messageTitle=='Message title*'){
		alert('MessageTitle field is required');
		document.contact.messageTitle.value='Message title*';
		return false;
	}
	else if(messageText=='' || messageText=='Message text*'){
		alert('MessageText field is required');
		return false;
	}
	var dataString = 'name=' +name+ '&email=' +email+ '&topic=' +topic+ '&messageTitle=' +messageTitle+ '&messageText=' +messageText;
	var url ='sendMail.php';
	//alert(url);
	//alert(dataString);
	overlayFormSubmitter.postFormData(url,dataString,'message');
			
}