var layer = new String();
    var style = new String();
    var rightbrackets = new String();
    var leftbrackets = new String();

    // Set appropriate layer variables based on browser
    function check(){
	document.write 
	if (navigator.appVersion.indexOf("4.") != -1 && navigator.appName.indexOf("Netscape") != -1){
        layer = "layers";
        style = "";
	leftbrackets = "['"
	rightbrackets = "']"
    }
    else if (navigator.appVersion.indexOf("MSIE 4") != -1) {
        layer = "all";
        style = ".style";
	leftbrackets = "['"
	rightbrackets = "']"
    }
    else if (navigator.appVersion.indexOf("5.") != -1 || navigator.appVersion.indexOf("6.") != -1){
        layer = "getElementById";
        style = ".style";
	leftbrackets = "('"
	rightbrackets = "')"
    }
}

function rolloverM(layerRef, state){		
	  xPos = eval(event.x - 25);
	  eval("document." + layer + leftbrackets + layerRef + rightbrackets + style + ".left = '" + xPos + "'");	  
      eval("document." + layer + leftbrackets + layerRef + rightbrackets + style + ".visibility = '" + state + "'");
    }

function rollover(layerRef, state){		
      eval("document." + layer + leftbrackets + layerRef + rightbrackets + style + ".visibility = '" + state + "'");
    }