Calculators Effects >>> Graphing Function.


		<script 
		language="javascript"
		type="text/javascript">

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */

		<!-- Begin

		function 
		calculate()
		{

		var
		y
		=
		new
		Array();

		y[0]
		=
		null;

		y[1]
		=
		document.calculator.y1.value;

		y[2]
		=
		document.calculator.y2.value;

		var
		x
		=
		new
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		x[0]
		=
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		x[1]
		=
		document.calculator.x1.value;

		x[2]
		=
		document.calculator.x2.value;

		var 
		m =
		(y[2]
		-
		y[1])
		/
		(x[2]
		-
		x[1]);

		var 
		b =
		y[1]-(m
		*
		x[1]);

		var 
		formula =
		"y="+m+"x 
		+ "+b;

		var 
		rand =
		parseInt(Math.random()
		*
		7);

		var 
		parf =
		"y="+m+"x 
		+ "+rand;

		var 
		newm = 
		m /
		-1;

		var 
		perf =
		"y="+newm+"x 
		+ "+b;

		document.calculator.formula.value
		= 
		formula;

		document.calculator.slope.value
		= 
		m;

		document.calculator.yint.value
		= 
		b;

		document.calculator.parf.value
		= 
		parf;

		document.calculator.perf.value
		= 
		perf;

		}

		//  End -->

		</script>

		<form
		name="calculator">

		Enter coordinate values:

		<table
		border=0>

		<tr>

		<td>X1:</td>

		<td><input
		type=text
		name=x1
		size=10></td>

		</tr>

		<tr>

		<td>Y1:</td>

		<td><input
		type=text
		name=y1
		size=10></td>

		</tr>

		<tr>

		<td>X2:</td>

		<td><input
		type=text
		name=x2
		size=10></td>

		</tr>

		<tr>

		<td>Y2:</td>

		<td><input
		type=text
		name=y2
		size=10>

		<input 
		type=button
		value="Get 
		Results" 
		onClick="calculate();"></td>

		</tr>

		<tr>

		<td>Formula:</td>

		<td><input
		type=text
		name=formula
		size=50></td>

		</tr>

		<tr>

		<td>Slope:</td>

		<td><input
		type=text
		name=slope
		size=50></td>

		</tr>

		<tr>

		<td>Y-Intercept:</td>

		<td><input
		type=text
		name=yint
		size=50></td>

		</tr>

		<tr>

		<td>Parallel Line Formula:</td>

		<td><input
		type=text
		name=parf
		size=50></td>

		</tr>

		<tr>

		<td>Perpendicular Line Formula:</td>

		<td><input
		type=text
		name=perf
		size=50></td>

		</tr>

		</table>