var brc = navigator.userAgent.toLowerCase();
brc_msie6 = (/msie 7.0/.test(brc) || /msie 6.0/.test(brc)) && !/opera/.test(brc);
var brc_mac = /safari/.test(brc);
/*Dynamic load CSS according the different Explore*/
var headID = document.getElementsByTagName("head")[0];
var fileref=document.createElement("link") 
fileref.type = "text/css";
fileref.rel = "stylesheet";
if(brc_msie6)
	fileref.href = css_ie;
else if(brc_mac)
	fileref.href = css_mac;
else
	fileref.href = css_unie;
headID.appendChild(fileref);
//---------------------------------