browserName = navigator.appName;
	browserVer = parseInt(navigator.appVersion);
	testbrowser = 0;

	if(browserName=="Netscape" || (browserName.indexOf('Explorer')>0 && browserVer > 3))
	{
		dir="/images/";
		testbrowser=1;

		bt1_off = new Image(); bt1_off.src = ""+dir+"bt1_off.gif";
		bt1_on = new Image(); bt1_on.src = ""+dir+"bt1_on.gif";

		bt2_off = new Image(); bt2_off.src = ""+dir+"bt2_off.gif";
		bt2_on = new Image(); bt2_on.src = ""+dir+"bt2_on.gif";

		bt3_off = new Image(); bt3_off.src = ""+dir+"bt3_off.gif";
		bt3_on = new Image(); bt3_on.src = ""+dir+"bt3_on.gif";

		bt4_off = new Image(); bt4_off.src = ""+dir+"bt4_off.gif";
		bt4_on = new Image(); bt4_on.src = ""+dir+"bt4_on.gif";

		bt5_off = new Image(); bt5_off.src = ""+dir+"bt5_off.gif";
		bt5_on = new Image(); bt5_on.src = ""+dir+"bt5_on.gif";

		bt6_off = new Image(); bt6_off.src = ""+dir+"bt6_off.gif";
		bt6_on = new Image(); bt6_on.src = ""+dir+"bt6_on.gif";

		bt7_off = new Image(); bt7_off.src = ""+dir+"bt7_off.gif";
		bt7_on = new Image(); bt7_on.src = ""+dir+"bt7_on.gif";

	}