function validate(e){
	var code;
	if (!e) var e = window.event;
	if (e.keyCode) code = e.keyCode;
	else if (e.which) code = e.which;
	if (code < '13' || code > '13'){
		if (code < '48' || code > '57')event.returnValue=false;
	}
}
function dontleaveempty(id,name,num){
	var inputfieldvalue=eval(id+"."+name+".value");
	if (!inputfieldvalue)eval(id+"."+name+".value="+num);
}
function notempty(id,num){
	var inputfieldvalue=document.getElementById(id).value;
	if (document.getElementById(id).value == '' || document.getElementById(id).value < 1) document.getElementById(id).value=num;
}