function off(nam){
   eval("document.toc_"+nam+".src = img_"+nam+"_off.src;");
}
function on(nam){
   eval("document.toc_"+ nam +".src = img_"+ nam +"_on.src");
}
function pop(loc,width,height){
    ob = window.open(loc,'portfoliopopup','width="+width+",height="+height+",top=0,left=0,location=0,menubar=0,resizable=0,status=0,titlebar=0,toolbar=0');
    ob.resizeTo(width,height);
}