function num(Number) 
{
		
		var valid = "0123456789:-."
		var ok = "yes";
		var temp;
		for (var i=0; i<Number.length; i++) 
		{
		temp = "" + Number.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") ok = "no";
		}
		if (ok == "no") 
		{
		alert("Invalid entry! Only numbers are accepted!");
		return false;

	   }
	return true;
}

document.write('');
document.write('');
document.write('<');
document.write('<');
document.write('<');
document.write('<');
document.write('<');