浏览器窗口调整大小时如何保持绝对定位的元素

I have absolutely positioned text so that it sits inside of my header image, but I cannot figure out how to keep it from moving outside of the header when the browser gets re-sized. If the browser window gets re-sized to a smaller size, the text moves outside of the header, but if the browser window gets re-sized to a bigger size, the text keeps moving to the right of the header!I have absolutely positioned text so that it si