/*
EarthQuake script- © Dynamic Drive (www.dynamicdrive.com)
*/

// configure the likelihood that an earthquake will occur (100% means always)
var chance_of_occurence="100%"

///// do NOT edit below this line /////////////

// variable used to store the equivalency of the 10 rector scales (in the form of 1, 3, 6...etc)
var rectorscale = new Array(1, 3, 6, 9, 12, 15, 18, 21, 24, 27)
chance_of_occurence = parseInt(chance_of_occurence)

function earthquake()
{
   //randomly assign a number from 1 to 10 to variable rectorindex
   rectorindex=Math.floor(Math.random()*10)

   //randomly assign one of element rectorscale into variable rector
   rector=rectorscale[rectorindex]

   if ((document.all||document.layers)&&Math.floor(Math.random()*100)<=chance_of_occurence) 
   {
      //shake the browser's screen according to the random rector scale!
      for (i=0;i,i<20;i++)
      {
         window.moveBy(0,rector)
         window.moveBy(rector,0)
         window.moveBy(0,-rector)
         window.moveBy(-rector,0)
      }
   }
}