var submit = false;
function cSubmit() {
	return submit ? false : submit=true;
}

function submitForm(myForm) {
	var ok = cSubmit();
	
	if (ok) {
		disableButtons(myForm);
		myForm.submit();
	}
	
	return ok;
}

function checkSubmit(myForm) {
	var ok = cSubmit();
	
	if (ok) {
		disableButtons(myForm);
	}
	
	return ok;
}

function disableButtons(myForm) {
	for (i = 0; i < myForm.length; i++) {
		var myObj = myForm.elements[i];
		var myType = myObj.type.toLowerCase();
		
		if (myType == "submit" || myType == "button") {
			myObj.disabled = true;
		}
	}
}