function openWindow(url, width, height) {
        var Win = window.open(url,"text",'width=' + width + ',height=' + height + ',resizable=0,scrollbars=0,menubar=no,status=yes' );
}
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		shot1_over = newImage("../img/shot/shot1_over.jpg");
		shot2_over = newImage("../img/shot/shot2_over.jpg");		
		shot3_over = newImage("../img/shot/shot3_over.jpg");
		shot4_over = newImage("../img/shot/shot4_over.jpg");
		shot5_over = newImage("../img/shot/shot5_over.jpg");		
		shot6_over = newImage("../img/shot/shot6_over.jpg");
		shot7_over = newImage("../img/shot/shot7_over.jpg");		
		shot8_over = newImage("../img/shot/shot8_over.jpg");
		shot9_over = newImage("../img/shot/shot9_over.jpg");	
requirements_eng_over = newImage("../img/requirements_eng_over.gif");				
	preloadFlag = true;
	}
}