function doPopup(ParUrl, ParBreedte, ParHoogte, ParLeft, ParTop, ParScroll) {
	url = ParUrl;
	width = ParBreedte;	// width of window in pixels
	height = ParHoogte;	// height of window in pixels
	xpos = ParLeft 		// x position of new window
	ypos = ParTop	// y positon of new window
	windowprops = "left="+xpos+",top="+ypos+",width=" + width + ",height=" + height;
	if(ParScroll){
		windowprops += ", scrollbars=yes";
	}
	preview = window.open(url, "", windowprops);
}