rem: if(this.style.visibility != "hidden") this.style.visibility = "hidden"; 
add: if (this.style.visibility != "hidden") this.style.visibility = "hidden"; 
context: 	setOpacity: function(opacity){		if (opacity == 0){			if(this.style.visibility != "hidden") this.style.visibility = "hidden";		} else {			if(this.style.visibility != "visible") this.style.visibility = "visible";		}		if (!this.currentStyle || !this.currentStyle.hasLayout) this.style.zoom = 1;		if (window.ie) this.style.filter = "alpha(opacity=" + opacity * 100 + ")";		this.style.opacity = this.opacity = opacity;		return this;	},
meta: 8516	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8516/0ea13c407f295a800d34adf6f6781e9d4f15d4d1/Element.js/buggy/Native/Element.js