// Pure Source Code - Another free Service to you from
// www.viewsource.dk, lots of free Java Applets, DHTML and JavaScripts 

<SCRIPT LANGUAGE="JavaScript1.2">
<!--
function shakeit(n) {
	if (document.forms[0].elements[0].checked) {x=4; y=12;}
	if (document.forms[0].elements[1].checked) {x=8; y=12;}
	if (document.forms[0].elements[2].checked) {x=13; y=6;}
	if (document.forms[0].elements[3].checked) {x=20; y=8;}

	if (self.moveBy) {
		for (i = x; i > 0; i--) {
			for (j = y; j > 0; j--) {
				self.moveBy(0,i);
				self.moveBy(i,0);
				self.moveBy(0,-i);
				self.moveBy(-i,0);
			}
		}
	}
}
// -->
</script>


 <form>
<font face="Arial,Helvetica" size="2"><b>Choose from the Richter Scale</b></font><br>
<input type="radio" name="level" value="1" checked="True"><font face="Arial,Helvetica" size="2"> Strenght 1</font><br>
<input type="radio" name="level" value="2"><font face="Arial,Helvetica" size="2"> Strenght 3</font><br>
<input type="radio" name="level" value="3"><font face="Arial,helvetica" size="2"> Strenght 5</font><br>
<input type="radio" name="level" value="4"><font face="Arial,helvetica" size="2"> Strenght 7</font>
<input type=button onClick="shakeit(this.form);" value="Start Earthquake effect">
</font>
</form>