function rollOver(ImgNme){
	var obj=(document.images)? document.images[ImgNme]:0;
	var ClicNme=(document.clicImg)? document.clicImg.name:""; 
	if (!obj && document.layers) {
		for (i=0; i<document.layers.length; i++) { ObjLyr=document.layers[i].document;
			if (ObjLyr.images && ObjLyr.images[ImgNme]) obj=ObjLyr.images[ImgNme];}}                
	if (ClicNme!=ImgNme) obj.src=(obj.src.lastIndexOf('_2')!=-1)? obj.src.replace(/_2/gi,"_1"):obj.src.replace(/_1/gi,"_2");
	document.OnImg=obj;
}