/*  Removes all charcaters except / , 0-9*/
function isNumeric( c )
{	
	return ( c >= '0' && c <= '9' )
}
function removeNonNumerics( s )
{

	if ( s == null ) return null
	s = '' + s
	var tmp = ''
	var isLeadingZero = false
	for ( var i = 0; i < s.length; i++ ){
		var c = s.charAt( i )
		if ( isNumeric( c ) ){
			if ( isLeadingZero == true && c == '0' ){
				continue;
			}else{
				isLeadingZero = false
			}tmp = tmp + c
		}
	}return tmp
}