rem: if (rd != null) this.r += rd; if (gd != null) this.g += gd; if (bd != null) this.b += bd; if (ad != null) this.a += ad; 
add: x = 4; while (-1<--x) { if (arguments[x] != null) this[rgba[x]] += arguments[x]; } 
context:         this.adjust = function(rd, gd, bd, ad) {            if (rd != null)                this.r += rd;            if (gd != null)                this.g += gd;            if (bd != null)                this.b += bd;            if (ad != null)                this.a += ad;            return this.normalize();        };
meta: 2005	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2005/50c622e19ff60aaa2744d650130690f2b6f2450e/jquery.flot.js/clean/jquery.flot.js