Array.prototype.indexOf=function(obj){     
    var result=-1;     
    for (var i=0;i< this.length;i++){     
        if (this[i]==obj){     
            result=i;     
            break;     
        }     
    }     
    return result;     
} 

Array.prototype.contains=function(obj){     
    return (this.indexOf(obj)>=0);     
} 

Array.prototype.append=function(obj){     
    this[this.length]=obj;       
} 

function RedirectPage(pageUrl, querystring){
    var windowLocation = pageUrl + '?';
    var i = 0;
    if ( querystring.length ){
        for ( i = 0; i < querystring.length; i ++ ){
            windowLocation += querystring[i];            
            if ( i != querystring.length - 1 ){
                windowLocation += '&';
            }
        }
    } 
    else{
        windowLocation += querystring == null ? "" : querystring;
    }
    window.location = windowLocation;
}

/**
* Returns get parameters.
*
* If the desired param does not exist, null will be returned
*
* @example value = $.getURLParam("paramName");
*/ 
jQuery.extend({
    getURLParam: function(strParamName){
        var strReturn = "";
        var strHref = window.location.href;
        var bFound=false;

        var cmpstring = strParamName + "=";
        var cmplen = cmpstring.length;

        if ( strHref.indexOf("?") > -1 ){
            var strQueryString = strHref.substr(strHref.indexOf("?")+1);
            var aQueryString = strQueryString.split("&");
            for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
                if (aQueryString[iParam].substr(0,cmplen)==cmpstring){
                    var aParam = aQueryString[iParam].split("=");
                    strReturn = aParam[1];
                    bFound=true;
                    break;
                }
            }
        }
        if (bFound==false) 
            return null;
        return strReturn;
    }
});

(function($) {
	$.extend($.fx.step,{
	    backgroundPosition: function(fx) {
            if (fx.state === 0 && typeof fx.end == 'string') {
                var start = $.curCSS(fx.elem,'backgroundPosition');
                start = toArray(start);
                fx.start = [start[0],start[2]];
                var end = toArray(fx.end);
                fx.end = [end[0],end[2]];
                fx.unit = [end[1],end[3]];
			}
            var nowPosX = [];
            nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0];
            nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1];           
            fx.elem.style.backgroundPosition = nowPosX[0]+' '+nowPosX[1];
            
           function toArray(strg){
               strg = strg.replace(/left|top/g,'0px');
               strg = strg.replace(/right|bottom/g,'100%');
               strg = strg.replace(/([0-9\.]+)(\s|\)|$)/g,"$1px$2");
               var res = strg.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/);
               return [parseFloat(res[1],10),res[2],parseFloat(res[3],10),res[4]];
           }
        }
	});
})(jQuery);