// detect browser 

browserName = navigator.appName;   
         browserVer = parseInt(navigator.appVersion);
             if (browserName == "Netscape" && browserVer >= 3) browserVer = "1";
             else if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) browserVer = "1";
             else browserVer = "2";
             
//Preloading topnav
if (browserVer == 1) {
image001= new Image(39,125);
image001.src="../includes/images/topnav_1_home.gif";
image002= new Image(39,125);
image002.src="../includes/images/topnav_2_summary.gif";
image003= new Image(39,125);
image003.src="../includes/images/topnav_3_authors.gif";
image004= new Image(39,125);
image004.src="../includes/images/topnav_4_reviews.gif";
image005= new Image(39,125);
image005.src="../includes/images/topnav_5_premium.gif";
image006= new Image(39,125);
image006.src="../includes/images/topnav_1_home_roll.gif";
image007= new Image(39,125);
image007.src="../includes/images/topnav_2_summary_roll.gif";
image008= new Image(39,125);
image008.src="../includes/images/topnav_3_authors_roll.gif";
image009= new Image(39,125);
image009.src="../includes/images/topnav_4_reviews_roll.gif";
image010= new Image(39,125);
image010.src="../includes/images/topnav_5_premium_roll.gif";

//Preloading rhsnav - order may vary
image011= new Image(29,158);
image011.src="../includes/rhs_images/rhs_experts.gif";
image012= new Image(29,158);
image012.src="../includes/rhs_images/rhs_links.gif";
image013= new Image(29,158);
image013.src="../includes/rhs_images/rhs_purchasing.gif";
image014= new Image(29,158);
image014.src="../includes/rhs_images/rhs_quotes.gif";
image015= new Image(29,158);
image015.src="../includes/rhs_images/rhs_register.gif";
image016= new Image(29,158);
image016.src="../includes/rhs_images/rhs_experts_roll.gif";
image017= new Image(29,158);
image017.src="../includes/rhs_images/rhs_links_roll.gif";
image018= new Image(29,158);
image018.src="../includes/rhs_images/rhs_purchasing_roll.gif";
image019= new Image(29,158);
image019.src="../includes/rhs_images/rhs_quotes_roll.gif";
image020= new Image(29,158);
image020.src="../includes/rhs_images/rhs_register_roll.gif";

//Preloading xtra rhsnav - order may vary
image021= new Image(29,158);
image021.src="../includes/rhs_images/rhs_roi.gif";
image022= new Image(29,158);
image022.src="../includes/rhs_images/rhs_roi_roll.gif";

image023= new Image(29,158);
image023.src="../includes/rhs_images/rhs_consulting.gif";
image024= new Image(29,158);
image024.src="../includes/rhs_images/rhs_consulting_roll.gif";



}

//image swapping function

function switcharoo(imgDocID, imgObjName, comment) 
{
if (browserVer == 1) {
document.images[imgDocID].src = eval(imgObjName + ".src");
window.status = comment; return true;
}}