function trim(s){
	while (s.substring(0,1) == ' ')
		s = s.substring(1,s.length);
	while (s.substring(s.length-1,s.length) == ' ')
		s = s.substring(0,s.length-1);
	return s;
}

function validate(){
	if(trim(document.getElementById('first_name').value)=="" || trim(document.getElementById('first_name').value).length<3 || !isNaN(trim(document.getElementById('first_name').value))){	
		alert("Enter your name (at least 3 chracteres)");
		document.getElementById('first_name').select();
		document.getElementById('first_name').focus();
		return false;
	}
	if(trim(document.getElementById('last_name').value)=="" || trim(document.getElementById('last_name').value).length<3 || !isNaN(trim(document.getElementById('last_name').value))){	
		alert("Enter your last name (at least 3 chracteres)");
		document.getElementById('last_name').select();
		document.getElementById('last_name').focus();
		return false;
	}

	var emailFilter=/^.+@.+\..{2,3}$/;
	if(trim(document.getElementById('email').value)=="" || !(emailFilter.test(trim(document.getElementById('email').value)))){
		alert("Enter correct email address");
		document.getElementById('email').select();
		document.getElementById('email').focus();
		return false;
	}	

	if(trim(document.getElementById('org_name').value)=="" || !isNaN(trim(document.getElementById('org_name').value))){	
		alert("Enter institute name");
		document.getElementById('org_name').select();
		document.getElementById('org_name').focus();
		return false;
	}

	if(trim(document.getElementById('phone').value)==""){	
		alert("Enter telephone/mobile number (at least 8 chracteres)");
		document.getElementById('phone').select();
		document.getElementById('phone').focus();
		return false;
	}


}