//external js for PTHA rollovers

//Detect if browser is Netscape 3+ or IE 4+.
 bName = navigator.appName;
 bVer = parseInt(navigator.appVersion);
	if ((bName == "Netscape" && bVer >= 3)||(bName == "Microsoft Internet Explorer" && bVer >= 4))br = "n3";
	else br = "n2";

 //over buttons

 if (br == "n3") {

	img1on = new Image();
	img1on.src = "../buttons/homedw.gif"

	img2on = new Image();
	img2on.src = "../buttons/historydw.gif"

	img3on = new Image();
	img3on.src = "../buttons/medicaldw.gif"

	img4on = new Image();
	img4on.src = "../buttons/dentaldw.gif"

	img5on = new Image();
	img5on.src = "../buttons/kwawadw.gif"

	img6on = new Image();
	img6on.src = "../buttons/treatmentdw.gif"


//normal buttons

	img1off = new Image();
	img1off.src = "../buttons/home.gif"

	img2off = new Image();
	img2off.src = "../buttons/history.gif"

	img3off = new Image();
	img3off.src = "../buttons/medical.gif"

	img4off = new Image();
	img4off.src = "../buttons/dental.gif"

	img5off = new Image();
	img5off.src = "../buttons/kwawa.gif"

	img6off = new Image();
	img6off.src = "../buttons/treatment.gif"

 }

 //function to active images

 function imgAct(imgName) {
	if(br == "n3") {
	document[imgName].src = eval(imgName + "on.src");
 }
 }

 //function to inactive images

 function imgInact(imgName) {
	if(br == "n3") {
	document[imgName].src = eval(imgName + "off.src");
 }
 }