function OpenViewer (src, name, width, height) {

	width  = screen.availWidth;
	height = screen.availHeight;

	width  = 800;
	height = 600;

	windowFeatures = "width=" + width.toString()
				+ ", height=" + height.toString()
			 	+ ", scrollbars=no"
			 	+ ", resizable=yes"
			 	+ ", toolbar=no"
			 	+ ", status=no"
			 	+ ", menubar=no"
			 	+ ", location=no"
			 	+ ", directories=no";

	//alert(windowFeatures);

	visionneuse = window.open (src, "", windowFeatures);
	visionneuse.moveTo ((screen.availWidth - width)/2,(screen.availHeight - height)/2);
	return true;
}