function checkStylesheet() {

	var agt=navigator.userAgent.toLowerCase();
	var is_mac   = (agt.indexOf("mac")!=-1);
	if (is_mac) { 
	   document.write('<link rel="stylesheet" href="physician_placement_stylesheetMac.css" type="text/css">')
	            } 
        else {

	var isie;
	  {
	if (( navigator.userAgent.indexOf("Opera") !=-1 ) && ( navigator.userAgent.indexOf("MSIE") !=-1))    {
	   document.write('<link rel="stylesheet" href="physician_placement_stylesheetOpera.css" type="text/css">')
	                                                                                                     }
	else if (navigator.appName == "Microsoft Internet Explorer") {
	   document.write('<link rel="stylesheet" href="physician_placement_stylesheet.css" type="text/css">')
                                                                     }
	else if (navigator.appName == "Netscape" && parseInt(navigator.appVersion)<=4) {
	   document.write('<link rel="stylesheet" href="physician_placement_stylesheet4.css" type="text/css">')
										       }
	else if (navigator.appName == "Netscape" && navigator.appCodeName =="Mozilla") {
	   document.write('<link rel="stylesheet" href="physician_placement_stylesheetMoz.css" type="text/css">')
										       }
	else if (navigator.appName == "Netscape" && parseInt(navigator.appVersion)>=4) {
	   document.write('<link rel="stylesheet" href="physician_placement_stylesheetNS.css" type="text/css">')
										       }
	else 
	  document.write('<link rel="stylesheet" href="physician_placement_stylesheet.css" type="text/css">')
           
          }}
                           }
checkStylesheet()