function grayOut(vis,options){var options=options||{};var zindex=options.zindex||50;var opacity=options.opacity||50;var opaque=(opacity/100);var bgcolor=options.bgcolor||'#000000';var dark=document.getElementById('darkenScreenObject');if(!dark){var tbody=document.getElementsByTagName("body")[0];var tnode=document.createElement('div');tnode.style.position='absolute';tnode.style.top='0px';tnode.style.left='0px';tnode.style.overflow='hidden';tnode.style.display='none';tnode.id='darkenScreenObject';tbody.appendChild(tnode);dark=document.getElementById('darkenScreenObject')}if(vis){if(document.body&&(document.body.scrollWidth||document.body.scrollHeight)){var pageWidth=document.body.scrollWidth+'px';var pageHeight=document.body.scrollHeight+'px'}else if(document.body.offsetWidth){var pageWidth=document.body.offsetWidth+'px';var pageHeight=document.body.offsetHeight+'px'}else{var pageWidth='100%';var pageHeight='100%'}dark.style.opacity=opaque;dark.style.MozOpacity=opaque;dark.style.filter='alpha(opacity='+opacity+')';dark.style.zIndex=zindex;dark.style.backgroundColor=bgcolor;dark.style.width=pageWidth;dark.style.height=pageHeight;dark.style.display='block'}else{dark.style.display='none'}}