required = new Array("contact_name", "address", "phone", "message");
	required_show = new Array("Contact Name", "Address", "Phone Number", "Message");
	
	function SendForm () {
	
	var i, j;
	
	for(j=0; j<required.length; j++) {
		for (i=0; i<document.forms[0].length; i++) {
			if (document.forms[0].elements[i].name == required[j] &&
	  document.forms[0].elements[i].value == "" ) {
				alert('Please, fill the "' + required_show[j] + '" field');
				document.forms[0].elements[i].focus();
				return false;
			}
		}
	}
	
	return true;
	}