function emptyDefault(obj) {
	obj.value='';
}

function blurDefault(obj, value) {
	if(obj.value == '') {
		obj.value = value;
	}
}

function openImage(imageId, width, height) {
    var left = (screen.availWidth-width)/2;
    var top = (screen.availHeight-height)/2;
	window.open('image.php?news_image_id=' + imageId, 'Popup', "width=" + width + ",height=" + height + ",top="+ top +",left="+ left +",scrollbars=no,resizable=0");
}