var	ns4 = (document.layers)? true:false
var	ie4 = (document.all)? true:false
var	ns6 = (document.getElementById)? true:false
var agent = navigator.userAgent.toLowerCase();


// popup a window to display website
function conferenceimage() {
	popupWindow('conferenceimage.htm', 850,313);
}


// generic window popup function... resizes as it opens
function popupWindow(popupLocation, popupWidth, popupHeight) {

	var heightspeed = 20; 	// vertical speed
	var widthspeed 	= 20;  	// horizontal speed
	var leftdist 	= (screen.width - popupWidth) / 2;    	// distance to left edge of window
	var topdist 	= (screen.height - popupHeight) / 2;   	// distance to top edge of window
	if (document.all) {
		var popup = window.open("","pop","left=" + leftdist + ",top=" + topdist + ",width=4,height=4,scrollbars=no,resizable=no,toolbar=no,menubar=no,location=no,status=no","focus();");
		for (sizeheight = 1; sizeheight < popupHeight; sizeheight += heightspeed) {
			popup.resizeTo("1 ", sizeheight);
			}

		for (sizewidth = 1; sizewidth < popupWidth; sizewidth += widthspeed) {
			popup.resizeTo(sizewidth, sizeheight);
			}	

		popup.resizeTo(popupWidth, popupHeight);
		popup.location = popupLocation;
	} 
	else {
		var popup = window.open(popupLocation,"pop","left=" + leftdist + ",top=" + topdist + ",width=" + popupWidth + ",height=" + popupHeight + ",scrollbars=no,resizable=no,toolbar=no,menubar=no,location=no,status=no","focus();");
		}
		
		popup.focus();
}


// generic window popup function... resizes as it opens, with no features
function popupWindow2(popupLocation,  popupWidth, popupHeight) {

	var heightspeed = 20; 	// vertical speed
	var widthspeed 	= 20;  	// horizontal speed
	var leftdist 	= (screen.width - popupWidth) / 2;    	// distance to left edge of window
	var topdist 	= (screen.height - popupHeight) / 2;   	// distance to top edge of window
	if (document.all) {
		var popup = window.open("", "pop","left=" + leftdist + ",top=" + topdist + ",width=4,height=4,scrollbars=yes,resizable=no,toolbar=no,menubar=no,location=no,status=no","focus();");
		for (sizeheight = 1; sizeheight < popupHeight; sizeheight += heightspeed) {
			popup.resizeTo("1", sizeheight);
			}

		for (sizewidth = 1; sizewidth < popupWidth; sizewidth += widthspeed) {
			popup.resizeTo(sizewidth, sizeheight);
			}	

		popup.resizeTo(popupWidth, popupHeight);
		popup.location = popupLocation;
	} 
	else {
		var popup = window.open(popupLocation,"pop","left=" + leftdist + ",top=" + topdist + ",width=" + popupWidth + ",height=" + popupHeight + ",scrollbars=yes,resizable=no,toolbar=no,menubar=no,location=no,status=no","focus();");
		}
		popup.focus();
}