minecraft keeps crashing
Hello, I just recently started playing minecraft, but I have a serious problem.
I originaly had the "out of memory" error, but solved it after searching the web. Now I have a new strange problem: I can play the game, both in my browser and offline, but after a few minutes, the game will crash. This means, in the browser, the segment of the screen where the game used to be will turn white and my mouse will disappear when i play it in the browser and offline, the game dissappears. My changes will always be saved, but it is a pain to have to load the game again everytime. I have an 8 year old computer (can't tell you more), running windows xp and i have the newest version of java.
I hope somebody can help me with this.