How to show alertbox in HTML page when it loads

Mar 5 2012 5:05 AM

Dear All,

I am designing simple HTML page.
My requirement is when the page loads it should display alert message box with two buttons ie.OK

If i click OK buttons then the page will display.

How can i do this and i need to manipulate alertbox properties like

backgroundcolor
fontstyle
fontsize
height
width etc...

Thanks in Advance