//document.oncontextmenu=new Function("event.returnValue=false;");
function $(obj){return document.getElementById(obj);}
function show_menu(obj){
span=obj.getElementsByTagName("span")[0];
if(span){
obj.className="on";
XY = obj.getBoundingClientRect();
a=XY.top;
b=XY.left;
juan=document.documentElement.scrollTop;
span.style.top=a+juan+36+'px';
span.style.left=b+'px';
span.style.display='block';
}
obj.onmouseout=function(){span.style.display='none';obj.className=''}
}