op = 0; ie4 = 0; ie5 = 0; nn4 = 0; nn6 = 0; isMac = 0; if(document.images){ if(navigator.userAgent.indexOf("Opera") != -1){ op = 1; } else { ie4 = (document.all && !document.getElementById); nn4 = (document.layers); ie5 = (document.all && document.getElementById); nn6 = (document.addEventListener); } } if(navigator.userAgent.indexOf("Mac") != -1){ isMac = 1; } if(op){document.write(""); } if(ie4){document.write(""); } if(ie5){document.write(""); } if(nn4){document.write(""); } if(nn6){document.write(""); }