// <!--

	function transferData() {
			window.document.client_form.income.value=display.document.totals.grandTotal.value;						
			display.close();
			window.document.client_form.income_per.selectedIndex = 3;
	}

	function compute() {
		var addedValue;
		var periodInfo;
		
		// Initialize the totals by setting them all to 0
		for(var i=0;i< this.numSources;i++) {
			this[i].total =0;
		}

		// Compute a subtotal for each income source
	 		for(var i=0;i<familyTable.numPeople;i=(i+1)){
	 			for(var j=0;j< this.numSources;j++) {
					this[j][i].enteredNumber= (eval("display.document.incomeCalculator." + this[j].name  + i + ".value" ))-0
					periodInfo = (eval("display.document.incomeCalculator.period" + this[j].name  + i));
	 				this[j][i].period = periodInfo.options[periodInfo.selectedIndex].value;
	 				this[j][i].computeAnnual();
	 				this[j].total = this[j].total + this[j][i].annual;
				}
			}
			
		if(this.grandTotal == "not computed") {
			with(display.document) {

				writeln('<form name="totals">')
 					
				writeln('<a name="beginTotals"></a>')

				// Write out the subtotal for each income source
 				for(var i=0;i< this.numSources;i++) {
 		
					write("<br> <br> <br>Total from ", this[i].label,"  $")
					write('<input type="text" size="5" value="', this[i].total, '" name="total', i, '">')
					write(' per year')
					writeln('<br>');
					
				}

				//Compute the grand total
				this.grandTotal = 0;
				for(var i=0;i< this.numSources;i++) {	
					 this.grandTotal = this.grandTotal + this[i].total;
				}					
				
				// Write out a textbox for the Grand Total 
				write("<br> <br> <br>Grand Total")
				write('<br>');
				write('$<input type="text" name="grandTotal" value="' + this.grandTotal + '">')
				write('<br>');

				display.scrollBy(0,240); //Scroll down so the client can see the totals


				 if(window.navigator.appName.indexOf('Netscape') > -1){
					write('<input type="button" name="submitgrandtotal"  value="CONTINUE" > <p> <p> </form>');
					
					totals.submitgrandtotal.onclick = function() {window.parent.transferData();};
				 }
			}
		}
		else {

			this.grandTotal = 0;

			// Update the display of the subtotals
			// Then recompute the grandTotal and display it.		
			for(var i=0;i< this.numSources;i++) {
				display.document.totals['total' + i].value=this[i].total;			
				 this.grandTotal = this.grandTotal + this[i].total;
			}					
			display.document.totals.grandTotal.value=this.grandTotal;
		}
	 }
	 	

	function buildRow() {
		var nameString;
		display.document.write("<p><b>Income from ", this.label, "</b><br><br>")
		for(var i=0;i<familyTable.numPeople;i++){
			display.document.write(" How much does ", familyTable.familyNames[i], " make from ", this.label, "?    $")
			display.document.write(' <input type="text" value="0" name="', this.name, i, '">');
			display.document.write(' <select name="period', this.name, i,'" size="1">')
			display.document.write('<option value="12">monthly')
			display.document.write('<option value="1">yearly')
			display.document.write('<option value="52">weekly')
			display.document.write('</select> <br> <br>')
		}
	}
	
	function computeAnnual() {
		this.annual=(this.enteredNumber * this.period);
	}

	function incomeElement() {
		this.enteredNumber = 0;
		this.period= "monthly";
		this.annual=0;
		this.computeAnnual=computeAnnual;
	}
	
	function row(name,label, numPeople) {
		this.buildRow=buildRow;
		this.name = name;
		this.label = label;
		this.total = 0;
		for(var i=0;i<numPeople;i++){
			this[i] =new incomeElement;
		}
	}	

	function nameArray(numPeople){
		for(var i=0; i<numPeople;i++){
			this[i] =""
		}
	}

	function sourcesArray(numPeople){
		this.numSources=4;
		this.grandTotal = "not computed";	
		this.compute =compute;
		this[0] =new row("wages", "wages", numPeople);
		this[1] =new row("social_security", "social security (including disablility)", numPeople);
		this[2] =new row("welfare","welfare and unemployment insurance", numPeople);	
		this[3] =new row("veterans","veterans benefits", numPeople);	
		this[4] =new row("gifts","gifts from other people", numPeople);	
	}
	


	
	function tableObject (numPeople) {
		this.numPeople=numPeople;
		this.build =buildIncomeCalculator;
		this.income = new sourcesArray(numPeople);
		this.familyNames = new nameArray(numPeople);
	}
	
	

	
	function buildIncomeCalculator(numPeople) {
		
		display.document.write('<head> <title> Income Calculator </title> </head>');
		display.document.write('<form name="incomeCalculator">');
		
		
		for(var i=0;i<this.income.numSources;i++) {
			this.income[i].buildRow();
		}

		with(display.document) {	
			write('<p><p>');
			write('<input type="button" name="submitnames" value="Calculate our income!">');
			write('</form>');
			display.document.incomeCalculator.submitnames.onclick = function() {familyTable.income.compute();}

		}
	}
		
	


	function init() {
		numPeople=prompt("How many people are there in your family who have any income?", "");
		display = window.open("", "", "scrollbars");

		// make sure the client didn't select the "cancel" button. 
		if(numPeople==null){
			display.close();}
		else {
			familyTable = new tableObject(numPeople);
			with(display.document) {
				write('<form name="namingPeople">');

 				write('<b> It may be helpful for you to give a name or nickname for each person in your family. <br> </b>');
				write('<b> Or we can just call them person #1, person #2, etc. <br> </b>');
				write('<table>');
				for(var i=0;i< numPeople;i++) {
					write('<td>');
					write('<input type="text" name="person' + i + '" value="person #' +String(i+1)+ '">');
					write('</td>');
				} 
				write('</table>');
				write('<input type="button" value="CONTINUE" name="submission">');
				write('</form>');
				display.document.namingPeople.submission.onclick = function() {window.parent.assignNames();}
				close();
		}   // end of with statement
		
		} // end of "If the client didn't select cancel..."
	}
	
	function assignNames() {
		var familyNames = new nameArray(numPeople); 
		for(var i=0;i<numPeople;i++){
			familyTable.familyNames[i]=eval('display.document.namingPeople.person' + i + '.value')
		}
		familyTable.build(numPeople);
	}
	
	function verify(theForm) {
		if(isNaN(parseInt(theForm.famincome.value))) {
				window.alert('We are sorry. We cannot help you find housing until you enter a number in the box for income.');
				theForm.famincome.focus();
				theForm.famincome.select();
				return false;
		}
		if(theForm.ClientCity.value.length == 0) {
				window.alert('We are sorry. We cannot help you find housing until you tell us which city you are looking in.');
				theForm.ClientCity.focus();
				theForm.ClientCity.select();
				return false;
		}
		return true;

	}
	
// -->