function validateLink(field) {

		var value = field.value;
		var filter = /^(http:\/\/|https:\/\/){1}([\w]+)(.[\w]+){1,3}$/;
		if (value.indexOf("http://",0)!=0 && value.indexOf("https://",0)!=0) { value = 'http://'+value; }
		if (filter.test(value)) { field.style.color = 'green'; } else { field.style.color = 'red'; }

	}

	function validateEmail(field) {

		var value = field.value;
		var filter = /^.+@.+\..{2,4}$/;
		if (filter.test(value)) { field.style.color = 'green'; } else { field.style.color = 'red'; }

	}