i think i deleted my Mac partirion T-T

Hey guys i am mac newbie, I tried to install windows on my mac the other day using bootcamp everything went smooth i made 13 GB partition for windows since i am not gonna use it that much. I start installing windows xp pro sp2 everything was good till the end. I restart my computer and pressed opt/alt key so i can choose to reboot between partition nothing shows up just the icon for the windows cd. i took the cd out and tried to reboot it again just gray screen shows up . I googled the problem couldn't find anything so i though what if insert the leopard cd and try to install it again might work, I inserted OS X leopard and tried to reinstall it when I had to choose the which hard desk the leopard to be installed nothing shows up i tried this again nothing happened. is there anyway to fix the problem? and i wanna know if i can recover or backup my files coz they are alot of my school work that need in the future thanks in advance

xUKHCx said:

you could try resetting the pram by holding down cmd+opt+p+r on boot as this stores the startup drive.

What happens if you try booting with no disk in there, Have you tried leaving it for a little while e.g. a couple of minutes.

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hey xUKHCx
I tried all the reboot commands nothing shows up what made the problem worse the gray screen keep crashing too for example when press opt/alt to choose drive or cd the icons show up in the grey screen but computer crash in few seconds . I think my problem way bigger than i thought it would be. thanks