var preloadFlag = false;

function newImage(arg) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	
}

function preloadImages() {

		nav1 = newImage("images/navtxt_home_hear_on.gif");
		nav2 = newImage("images/navtxt_home_buy_on.gif");
		nav3 = newImage("images/navtxt_home_schedperform_on.gif");
		nav4 = newImage("images/navtxt_home_pastappear_on.gif");
		
		nav5 = newImage("images/navtxt_inst_hear_on.gif");
		nav6 = newImage("images/navtxt_inst_buy_on.gif");
		nav7 = newImage("images/navtxt_inst_schedperform_on.gif");
		nav8 = newImage("images/navtxt_inst_pastappear_on.gif");
		
		nav9 = newImage("images/topnav_about_on.gif");
		nav10 = newImage("images/topnav_contact_on.gif");
		
		btn1 = newImage("images/btn_alphatron_on.gif");
		btn2 = newImage("images/btn_courtesymod_on.gif");
		btn3 = newImage("images/btn_dpc_on.gif");
		btn4 = newImage("images/btn_fourbyfour_on.gif");
		btn5 = newImage("images/btn_melodygin_on.gif");
		btn6 = newImage("images/btn_modela_on.gif");
		btn7 = newImage("images/btn_rosterer_on.gif");
		btn8 = newImage("images/btn_swarmatron_on.gif");
		btn9 = newImage("images/btn_switchyard_on.gif");
		
		btn11 = newImage("images/btn_alphatron_sm_on.gif");
		btn12 = newImage("images/btn_courtesymod_sm_on.gif");
		btn13 = newImage("images/btn_dpc_sm_on.gif");
		btn14 = newImage("images/btn_fourbyfour_sm_on.gif");
		btn15 = newImage("images/btn_melodygin_sm_on.gif");
		btn16 = newImage("images/btn_modela_sm_on.gif");
		btn17 = newImage("images/btn_rosterer_sm_on.gif");
		btn18 = newImage("images/btn_swarmatron_sm_on.gif");
		btn19 = newImage("images/btn_switchyard_sm_on.gif");
		
		preloadFlag = true;
	
}
function preloaddpc() {

		dpc1 = newImage("images/img_dpc3.jpg");
		dpc2 = newImage("images/img_dpc4.jpg");
		dpc3 = newImage("images/img_dpc5.jpg");
		dpc4 = newImage("images/img_dpc6.jpg");
		
		
		preloadFlag = true;
	
}
function popup(url, winname)
{
	window.open(url, winname, "width=370,height=330");
}
function changeImages() 
{
	if (preloadFlag == true) {
		for (var i=0; i<changeImages.arguments.length; i+=2) 
		{
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}


var laston="";
	function toggleobject(objectid)
	{
		//alert(objectid);
		if(document.getElementById(objectid).className == 'nodisplay') 
		{
			if(laston!="") document.getElementById(laston).className = 'nodisplay';
			document.getElementById(objectid).className = 'yesdisplay';
			laston=objectid;
		}
		else 
		{
			document.getElementById(objectid).className = 'nodisplay';
			laston="";
		}
		
	}