var isNav, isIE
if(navigator.appVersion.charAt(0) >= "4") {
        if(navigator.appName == "Netscape"){
                isNav = true
        }else if(navigator.appVersion.indexOf("MSIE") != -1) {
                isIE = true
        }
}


function swap(imgName,imgSwap) {
        if(isNav){
                document[imgName].src='images/' + imgSwap + '_over.gif'
        }else {
                document.all[imgName].src = 'images/' + imgSwap + '_over.gif'
        }
}

function swappng(imgName,imgSwap) {
        if(isNav){
                document[imgName].src='images/' + imgSwap + '_over.png'
        }else {
                document.all[imgName].src = 'images/' + imgSwap + '_over.png'
        }
}

function swapBackpng(imgName,imgSwap) {
        if(isNav){
                document[imgName].src='images/' + imgSwap + '.png'
        }else {
                document.all[imgName].src = 'images/' + imgSwap + '.png'
        }
}  

function swapBack(imgName,imgSwap) {
        if(isNav){
                document[imgName].src='images/' + imgSwap + '.gif'
        }else {
                document.all[imgName].src = 'images/' + imgSwap + '.gif'
        }
}  

function swaps(imgName,imgSwap) {
        if(isNav){
                document[imgName].src='../images/' + imgSwap + '_over.gif'
        }else {
                document.all[imgName].src = '../images/' + imgSwap + '_over.gif'
        }
}
      
function swapsBack(imgName,imgSwap) {
        if(isNav){
                document[imgName].src='../images/' + imgSwap + '.gif'
        }else {
                document.all[imgName].src = '../images/' + imgSwap + '.gif'
        }
}  


function swap2(imgName,imgSwap) {
        if(isNav){
                document[imgName].src='../images/' + imgSwap + '_over.gif'
        }else {
                document.all[imgName].src = '../images/' + imgSwap + '_over.gif'
        }
}
      
function swapBack2(imgName,imgSwap) {
        if(isNav){
                document[imgName].src='../images/' + imgSwap + '.gif'
        }else {
                document.all[imgName].src = '../images/' + imgSwap + '.gif'
        }
}