function validateForm() {
	if (!document.getElementsByTagName) return false;

	var blnvalidate = true;
	var elementsInputs;
	elementsInputs = document.getElementsByTagName("input");
	
	for (var i = 0; i < elementsInputs.length; i++) { 
		if (elementsInputs[i].value == "") { 
			blnvalidate = false; 
			alert('All form fields must be completed before submitting');
			break;
		}
	} 
	return blnvalidate;	
}