function dimImgs(currCatID,ovrCatID,setstate,oldstate) {
	for(var i=0;i<document.images.length;i++) {

		// current: switch OFF | ON
		if(document.images[i].name=="proj_"+currCatID) {
			var imgpath=document.images[i].src
			document.images[i].src = imgpath.replace(eval("/"+setstate+"/"),oldstate);
		}

		// mouseover: switch ON | OFF
		if(document.images[i].name=="proj_"+ovrCatID) {
			var imgpath=document.images[i].src
			document.images[i].src = imgpath.replace(eval("/"+oldstate+"/"),setstate);
		}
	}
}