var Url = {  
  
    // public method for url encoding  
    encode : function (string) {  
        return escape(this._utf8_encode(string));  
    },  
  
    // public method for url decoding  
    decode : function (string) {  
        return this._utf8_decode(unescape(string));  
    },  
  
    // private method for UTF-8 encoding  
    _utf8_encode : function (string) {  
        string = string.replace(/\r\n/g,"\n");  
        var utftext = "";  
  
        for (var n = 0; n < string.length; n++) {  
  
            var c = string.charCodeAt(n);  
  
            if (c < 128) {  
                utftext += String.fromCharCode(c);  
            }  
            else if((c > 127) && (c < 2048)) {  
                utftext += String.fromCharCode((c >> 6) | 192);  
                utftext += String.fromCharCode((c & 63) | 128);  
            }  
            else {  
                utftext += String.fromCharCode((c >> 12) | 224);  
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);  
                utftext += String.fromCharCode((c & 63) | 128);  
            }  
  
        }  
  
        return utftext;  
    },  
  
    // private method for UTF-8 decoding  
    _utf8_decode : function (utftext) {  
        var string = "";  
        var i = 0;  
        var c = c1 = c2 = 0;  
  
        while ( i < utftext.length ) {  
  
            c = utftext.charCodeAt(i);  
  
            if (c < 128) {  
                string += String.fromCharCode(c);  
                i++;  
            }  
            else if((c > 191) && (c < 224)) {  
                c2 = utftext.charCodeAt(i+1);  
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));  
                i += 2;  
            }  
            else {  
                c2 = utftext.charCodeAt(i+1);  
                c3 = utftext.charCodeAt(i+2);  
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));  
                i += 3;  
            }  
  
        }  
  
        return string;  
    }  
  
}
function contact()
{
	var name 	= document.getElementById('name').value;
	var email 	= document.getElementById('email').value;
	var phone 	= document.getElementById('phone').value;
	var message	= document.getElementById('message').value;
	
	if(name == '' || email == '' || phone == '' || message == '')
	{
		document.getElementById('error_message').style.visibility = 'visible';
		return false;
	}
	var responseSuccess = function(o)
	{
		//alert(o.responseText);
		document.getElementById('contact_form_block').innerHTML = 'Thank You!';
	};

	var responseFailure = function(o)
	{
		//alert('Failure');
	};
	
	var callback =
	{
	  success:responseSuccess,
	  failure:responseFailure
	};
	
	document.getElementById('contact_form_block').innerHTML = '<img src="images/sending.gif" />';
	
	var sUrl = "php/do_contact.php";
	var s_id = 'name=' + Url.encode(name) + '&email=' + Url.encode(email) + '&phone=' + Url.encode(phone) + '&message=' + Url.encode(message);
	var conn = YAHOO.util.Connect.asyncRequest('POST', sUrl, callback, s_id);
	
	return false;
}