function CheckBrowser(){
    var cb = "Unknown";
    if(window.ActiveXObject){
        cb = "IE";
    }else if(navigator.userAgent.toLowerCase().indexOf("firefox") != -1){
        cb = "Firefox";
    }else if((typeof document.implementation != "undefined") && (typeof document.implementation.createDocument != "undefined") && (typeof HTMLDocument != "undefined")){
        cb = "Mozilla";
    }else if(navigator.userAgent.toLowerCase().indexOf("opera") != -1){
        cb = "Opera";
    }
    return cb;
}
var browser = CheckBrowser();
//document.write(browser);
var imgleft;
var imgright;
if(browser == "Firefox") {
	imgleft = 'margin:0 auto;float:left;left:0px;top:0px;border:0;z-index:-2;';
	imgright = 'margin:0 auto;float:right;right:0px;border:0;padding-top:0px;z-index:-1;';
}
if(browser == "IE") {
	imgleft = 'position:absolute;float:left;left:0px;top:0px;border:0;z-index:-2;';
	imgright = 'position:absolute;float:right;right:0px;border:0;padding-top:0px;z-index:-1;';
}
document.write("<div style='"+imgleft+"'><img src='images/ad2010-1.png' width='112' height='1189'></div>");
document.write("<div style='"+imgright+"'><img src='images/ad2010-2.png' width='112' height='1189'></div>");