var is_webkit = navigator.userAgent.toLowerCase().indexOf('webkit') > -1;
var is_opera = navigator.userAgent.toLowerCase().indexOf('opera') > -1;
if(is_webkit || is_opera) 
{
 var target = document.getElementById('skiptarget');
 target.href="#skiptarget";
 target.innerText="Start of main content";
 target.setAttribute("tabindex" , "0");
 document.getElementById('skiplink').setAttribute("onclick" , "document.getElementById('skiptarget').focus();");
}