function trim(s) {
		var s1 = s.replace(/^\s+/g,"");		// remove leading spaces
		var s2 = s1.replace(/\s+$/g, "");	// remove trailing spaces

		return s2;
	}


function ValidateIPAddress(ipaddr) {
    //Remember, this function will validate only Class C IP.
    //change to other IP Classes as you need
    ipaddr = ipaddr.replace( /\s/g, "") //remove spaces for checking
    var re = /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/; //regex. check for digits and in
                                          //all 4 quadrants of the IP
    if (re.test(ipaddr)) {
        //split into units with dots "."
        var parts = ipaddr.split(".");
        //if the first unit/quadrant of the IP is zero
        if (parseInt(parseFloat(parts[0])) == 0) {
            return false;
        }
        //if the fourth unit/quadrant of the IP is zero
        if (parseInt(parseFloat(parts[3])) == 0) {
            return false;
        }
        //if any part is greater than 255
        for (var i=0; i<parts.length; i++) {
            if (parseInt(parseFloat(parts[i])) > 255){
                return false;
            }
        }
        return true;
    } else {
        return false;
    }
}