/** XHConn - Simple XMLHTTP Interface - bfults@gmail.com - 2005-04-08        **
 ** Code licensed under Creative Commons Attribution-ShareAlike License      **
 ** http://creativecommons.org/licenses/by-sa/2.0/                           **/
function XHConn () {
	var xmlhttp, bComplete = false;
	try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); }
	catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }
	catch (e) { try { xmlhttp = new XMLHttpRequest(); }
	catch (e) { xmlhttp = false; }}}
	if (!xmlhttp) return null;
	this.connect = function(sURL, sMethod, sVars, fnDone) {
		if (!xmlhttp) return false;
		bComplete = false;
		sMethod = sMethod.toUpperCase();
		
		try {
			if (sMethod == "GET") {
				xmlhttp.open(sMethod, sURL+"?"+sVars, true);
				sVars = "";
			} else {
				xmlhttp.open(sMethod, sURL, true);
				xmlhttp.setRequestHeader("Method", "POST "+sURL+" HTTP/1.1");
				xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			}
			xmlhttp.onreadystatechange = function() {
				if (xmlhttp.readyState == 4 && !bComplete) {
				  bComplete = true;
				  fnDone(xmlhttp);
				}
			};
			xmlhttp.send(sVars);
		} catch(z) { 
			return false; 
		}
		return true;
	};
	return this;
}//

/** ########## **/

function xh_result (objID, php, paramstr) {
	var myConn;
	var myConn = new XHConn();
	if (!myConn) alert("XMLHTTP not available. Try a newer/better browser.");
	var fnWhenDone = function (oXML) {
		var target = getObj (objID);
		target.innerHTML = oXML.responseText;
	}
	myConn.connect(php,"POST",paramstr, fnWhenDone);		
}// 

function xh_label (objID, php, paramstr) {
	var obj = getObj(objID);
	if (obj ){
		if (obj.style.display == 'block') {
			obj.style.display = 'none';
			return false;			
		} else {
			obj.style.display = 'block';
			return xh_result (objID, php, paramstr);			
		}
	}
}

/* ******* */

Number.prototype.toFixed2=function(x) {
	var temp=this;
	temp=Math.round(temp*Math.pow(10,x))/Math.pow(10,x);
	return temp;
}


/* ******* */


function round2 (val, precision, mode) {
    // http://kevin.vanzonneveld.net
    // +   original by: Philip Peterson
    // +    revised by: Onno Marsman
    // +      input by: Greenseed
    // +    revised by: T.Wild
    // %        note 1: Great work. Ideas for improvement:
    // %        note 1:  - code more compliant with developer guidelines
    // %        note 1:  - for implementing PHP constant arguments look at
    // %        note 1:  the pathinfo() function, it offers the greatest
    // %        note 1:  flexibility & compatibility possible
    // *     example 1: round(1241757, -3);
    // *     returns 1: 1242000
    // *     example 2: round(3.6);
    // *     returns 2: 4
    // *     example 3: round(2.835,2);
    // *     returns 3: 2.84
 
    /* Declare Variables
     * retVal  - temporay holder of the value to be returned
     * V       - String representation of val
 
     * integer - Integer portion of val
     * decimal - decimal portion of val
     * decp    - characterindex of . [decimal point] inV
     * negative- was val a negative value?
     *
     * _round_half_oe - Rounding function for ROUND_HALF_ODD and ROUND_HALF_EVEN
 
     * _round_half_ud - Rounding function for ROUND_HALF_UP and ROUND_HALF_DOWN
     * _round_half    - Primary function for round half rounding modes
     */
    var retVal=0,v='',integer='',decimal='',decp=0,negative=false;
    var _round_half_oe = function (dtR,dtLa,even){
        if (even === true) {
            if (dtLa == 50) {
                if ((dtR % 2) === 1) {
                    if (dtLa >= 5) {
                        dtR+=1;
                    } else {
                        dtR-=1;
                    }
                }
            }else if (dtLa >= 5) {
                dtR+=1;
            }
        }else{
            if (dtLa == 5) {
                if ((dtR % 2) === 0) {
                    if (dtLa >= 5) {
                        dtR+=1;
                    }else{
                        dtR-=1;
                    }
                }
            }else if (dtLa >= 5) {
                dtR+=1;
            }
        }
 
        return dtR;
    };
    var _round_half_ud = function (dtR,dtLa,up) {
        if (up === true) {
            if (dtLa>=5) {
                dtR+=1;
            }
        }else{
            if (dtLa>5) {
                dtR+=1;
            }
        }
        return dtR;
    };
    var _round_half = function (val,decplaces,mode){
    /*Declare variables
         *V       - string representation of Val
         *Vlen    - The length of V - used only when rounding intgerers
 
         *VlenDif - The difference between the lengths of the original V
         *          and the V after being truncated
         *decp    - character in index of . [decimal place] in V
         *integer - Integr protion of Val
         *decimal - Decimal portion of Val
         *DigitToRound - The digit to round
 
         *DigitToLookAt- The digit to comapre when rounding
         *
         *round - A function to do the rounding
         */
        var v = val.toString(),vlen=0,vlenDif=0;
        var decp = v.indexOf('.');
 
        var digitToRound = 0,digitToLookAt = 0;
        var integer='',decimal='';
        var round = null,bool=false;
        switch (mode) {
            case 'up':
                bool = true;
                // Fall-through
            case 'down':
                round = _round_half_ud;
                break;
            case 'even':
                bool = true;
            case 'odd':
                round = _round_half_oe;
                break;
        }
        if (decplaces < 0){ //Int round
            vlen=v.length;
 
            decplaces = vlen + decplaces;
            digitToLookAt = Number(v.charAt(decplaces));
            digitToRound  = Number(v.charAt(decplaces-1));
            digitToRound  = round(digitToRound,digitToLookAt,bool);
            v = v.slice(0,decplaces-1);
            vlenDif = vlen-v.length-1;
 
            if (digitToRound == 10){
                v = String(Number(v)+1)+"0";
            }else{
                v+=digitToRound;
            }
 
            v = Number(v)*(Math.pow(10,vlenDif));
        }else if (decplaces > 0){
            integer=v.slice(0,decp);
            decimal=v.slice(decp+1);
            digitToLookAt = Number(decimal.charAt(decplaces));
 
            digitToRound  = Number(decimal.charAt(decplaces-1));
            digitToRound  = round(digitToRound,digitToLookAt,bool);
            decimal=decimal.slice(0,decplaces-1);
            if (digitToRound==10){
                v=Number(integer+'.'+decimal)+(1*(Math.pow(10,(0-decimal.length))));
            }else{
                v=Number(integer+'.'+decimal+digitToRound);
            }
        }else{
            integer=v.slice(0,decp);
            decimal=v.slice(decp+1);
            digitToLookAt = Number(decimal.charAt(decplaces));
 
            digitToRound  = Number(integer.charAt(integer.length-1));
            digitToRound  = round(digitToRound,digitToLookAt,bool);
            decimal='0';
            integer = integer.slice(0,integer.length-1);
            if (digitToRound==10){
                v=Number(integer)+1;
            }else{
                v=Number(integer+digitToRound);
            }
        }
        return v;
    };
 
 
    //precision optional - defaults 0
    if (typeof precision == 'undefined') {
        precision = 0;
    }
    //mode optional - defaults round half up
    if (typeof mode == 'undefined') {
        mode = 'PHP_ROUND_HALF_UP';
    }
 
    if (val < 0){ //Remember if val is negative
        negative = true;
    }else{
        negative = false;
    }
 
    v = Math.abs(val).toString(); //Take a string representation of val
    decp = v.indexOf('.');        //And locate the decimal point
    if ((decp == -1) && (precision >=0)){
   /* If there is no deciaml point and the precision is greater than 0
         * there is no need to round, return val
         */
        return val;
    }else{
        if (decp == -1){
            //There are no decimals so intger=V and decimal=0
            integer = v;
            decimal = '0';
        }else{
            //Otherwise we have to split the decimals from the integer
            integer = v.slice(0,decp);
            if (precision >= 0){
                //If the precision is greater than 0 then split the decimals from the integer
                //We truncate the decimals to a number of places equal to the precision requested+1
                decimal = v.substr(decp+1,precision+1);
            }else{
                //If the precision is less than 0 ignore the decimals - set to 0
                decimal = '0';
            }
        }
        if ((precision > 0) && (precision >= decimal.length)){
            /*If the precision requested is more decimal places than already exist
            * there is no need to round - return val
            */
            return val;
        }else if ((precision < 0) && (Math.abs(precision) >= integer.length)){
           /*If the precison is less than 0, and is greater than than the
             *number of digits in integer, return 0 - mimics PHP
             */
            return 0;
        }
        val = Number(integer+'.'+decimal); // After sanitizing recreate val
    }
 
    //Call approriate function based on passed mode, fall through for integer constants
    switch (mode){
        case 0:
        case 'PHP_ROUND_HALF_UP':
            retVal = _round_half(val,precision,'up');
            break;
        case 1:
        case 'PHP_ROUND_HALF_DOWN':
            retVal = _round_half(val, precision,'down');
            break;
        case 2:
        case 'PHP_ROUND_HALF_EVEN':
            retVal = _round_half(val,precision,'even');
            break;
        case 3:
        case 'PHP_ROUND_HALF_ODD':
            retVal = _round_half(val,precision,'odd');
            break;
    }
    if (negative){
        return 0-retVal;
    }else{
        return retVal;
    }
}