/*IS 449 Group Project
R. VanDaele 10/14/2006
A. Taylor 12/03/2006*/
// Create request variable
var xmlhttp;
// Create companyId array to store company objects
var companyId = new Array();
// Constructor defining company objects
function company(compId, compName, formType)
{
	this.id=compId;
	this.name=compName;
	this.type=formType;
}
// Load an XML document
function loadXMLDoc()
{
	var url='http://people.emich.edu/rvandael/449.php'
	// Determine browser type for specific request object
	browserObjCheck();
	// Object type identified
	if (xmlhttp!=null)
	{
		// Update page when ready
		xmlhttp.onreadystatechange=state_Change;
		xmlhttp.open("GET", url, true);
		xmlhttp.send(null);
	}
	// Alert user request object is null
	else
	{
		alert("  Your browser does not support XMLHTTP.  ");
	}
}
// Determine type of request object needed based on browser
function browserObjCheck()
{
	// Mozilla, Safari, etc.
	if (window.XMLHttpRequest)
	{
		 xmlhttp = new XMLHttpRequest();
	}
	// Microsoft
	else if (window.ActiveXObject)
	{
		try
		{
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch(otherMicrosoft)
		{
			xmlhttp = new ActiveXObject("Msxm12.XMLHTTP");
		}
	}	
}
// We got a response
function state_Change()
{
	// if xmlhttp shows "loaded"
	if (xmlhttp.readyState==4)
	{
		// if "OK"
		if (xmlhttp.status==200)
		{
			// Store response as xml
			xml=xmlhttp.responseXML;
			// Get company node list
			comp=xml.getElementsByTagName('company');
			// Get company financial data 
			webfin=xml.getElementsByTagName('filing');
			// Populate drop down list
			if(comp[0]!=null)
			{
				// Store company identification information in object array
				companyLoad(comp);
				// Populate company drop down list
				companyList();
				// Clear comp variable
				comp=null;
			}
			// Determine and Display financial data
			else if(webfin[0]!=null)
			{
				// Display financial summary information and compute ratio analysis
				financialData(webfin);
				// Clear webfin variable
				webfin=null;
			}
		}
		else
		{
			// Alert user that xml data was not retrieved
			alert(" Problem retrieving XML data: " + xmlhttp.statusText);
		}
	}
	// Clear xml variable
	xml=null;
}
// Load retrieved data into companyId array
function companyLoad(data)
{
	// Use tempData to store each company object
	var tempData = new Object();
	// Traverse node tree and store data into array
	for(i=0;i<data.length;i++)
	{
		// Get each company's id, name, and form type available
		compId=data[i].getElementsByTagName('id');
		compId=compId[0].childNodes[0].nodeValue;
		compName=data[i].getElementsByTagName('name');
		compName=compName[0].childNodes[0].nodeValue;
		formType=data[i].getElementsByTagName('type');
		formType=formType[0].childNodes[0].nodeValue;
		// Load array with company objects
		tempData=new company(compId,compName,formType);
		companyId[i]=tempData;
	}
}
// Display financial summary and compute financial analysis
function financialData(results)
{
	for(i=0;i<results[0].childNodes.length;i++)
	{
		// Read in company elements
		label=results[0].childNodes[i].nodeName;
		// Get financial summary data returned from the server
		labelVal=results[0].getElementsByTagName(label);
		labelVal=labelVal[0].childNodes[0].nodeValue;
		// Print financial summary data to screen
		financialSumm(label, labelVal);
	}
	// Check for empty financial summary elements
	checkForEmpty();
	// Compute ratios
	finAnalysis(results);
}
// Add company names to drop down list
function companyList()
{
	var index2=0;
	// Iterate through companyId array for company names
	for(index1=0;index1<companyId.length;index1++)
	{
		// Append only unique company names to drop down list
		if(document.options.companies.options[index2].text!=companyId[index1].name)
		{
			opt=document.createElement('option');
			opt.appendChild(document.createTextNode(companyId[index1].name));
			opt.setAttribute("value",index2);
			document.options.companies.appendChild(opt);
			// Increment second index for evaluating drop down index
			index2++;
		}
	}
}
// Add list of available forms (selected company) to drop down selection
function showForms()
{
	clearAll();
	// Empty our previous choices
	for (q=document.formDates.forms.options.length;q>=0;q--)
	{
		document.formDates.forms.options[q] = null;
	}
	// Add our default option
	opt=document.createElement('option');
	opt.appendChild(document.createTextNode('Available Forms'));
	opt.setAttribute("value",'#');
	document.formDates.forms.appendChild(opt);
	// Store selected index of company selected in drop-down
	var indexSelect=document.options.companies.selectedIndex;
	// Iterate through companyId array to determine which company is selected in drop-down
	for(index1=0;index1<companyId.length;index1++)
	{
		// Find the selected company's forms that are stored in the companyId array
		if(document.options.companies.options[indexSelect].text==companyId[index1].name)
		{
			// Found the selected company, save available forms into memory
			formType=companyId[index1].type;
			// Append available forms to form select drop down
			opt=document.createElement('option');
			opt.appendChild(document.createTextNode(companyId[index1].type));
			opt.setAttribute("value",index1);
			document.formDates.forms.appendChild(opt);
		}
	}
}
// New filing date was selected
function showSummary()
{
	// Store selected company index
	var indexSelect=document.options.companies.selectedIndex;
	// Clear financial data fields
	clearAll();
	// Iterate through companyId array to determine which company is selected in drop-down
	for(i=0;i<companyId.length;i++)
	{
		// Find the selected company's company id that is stored in companyId array
		if(document.options.companies.options[indexSelect].text==companyId[i].name)
		{
			// Company id found, terminate for loop
			var id=companyId[i].id;
			i=companyId.length;
		}
	}
	// Pass company id to server script for financial data available
	var url="http://people.emich.edu/rvandael/449.php?company=" + id;
	// Determine browser type for specific request object
	browserObjCheck();
	// Update page when ready
	xmlhttp.onreadystatechange=state_Change;
	xmlhttp.open("GET", url, true);
	xmlhttp.send(null);
}
// Print financial summary information to the screen
function financialSumm(temp1, temp2)
{
	switch(temp1)
	{
		case 'NetIncome': document.getElementById('ni').innerHTML=temp2; break;
		//case 'IncomeLossContinuingOperationsBeforeIncomeTaxes': document.getElementById('ebit').innerHTML=temp2; break;
		case 'TotalCurrentAssets': document.getElementById('ca').innerHTML=temp2; break;
		case 'Assets': document.getElementById('ta').innerHTML=temp2; break;
		case 'CurrentLiabilities': document.getElementById('cl').innerHTML=temp2; break;
		case 'Liabilities': document.getElementById('tl').innerHTML=temp2; break;
		case 'StockholdersEquity': document.getElementById('se').innerHTML=temp2; break;
		//case 'LongTermDebt': document.getElementById('ltd').innerHTML=temp2; break;
		default: break;
	}
	return 0;
}
// Get values returned from the server and print ratios to screen
function finAnalysis(x)
{
	var LongTermDebt, StockholdersEquity, Liabilities, Assets, IncomeLossContinuingOperationsBeforeIncomeTaxes,
	TotalDepreciationAmortization, AdjustmentDepreciationAmortization, InterestIncomeExpenseNet,
	TotalCurrentAssets, CurrentLiabilities, CashCashEquivalentsShortTermInvestments, ReceivablesNet,
	OperatingRevenue, NetIncome, InterestExpense = null;

	for(a=0;a<x[0].childNodes.length;a++)
	{
		// Get each individual label in list
		elementName=x[0].childNodes[a].nodeName;
		// Get values for each label
		elementValue=x[0].getElementsByTagName(elementName);
		elementValue=elementValue[0].childNodes[0].nodeValue;

		switch(elementName)
		{
			case 'LongTermDebt': LongTermDebt=elementValue; break;
			case 'StockholdersEquity': StockholdersEquity=elementValue; break;
			case 'Liabilities': Liabilities=elementValue; break;
			case 'Assets': Assets=elementValue; break;
			case 'IncomeLossContinuingOperationsBeforeIncomeTaxes': IncomeLossContinuingOperationsBeforeIncomeTaxes=elementValue; break;
			case 'TotalDepreciationAmortization': TotalDepreciationAmortization=elementValue; break;
			case 'AdjustmentDepreciationAmortization': AdjustmentDepreciationAmortization=elementValue; break;
			case 'InterestIncomeExpenseNet': InterestIncomeExpenseNet=elementValue; break;
			case 'TotalCurrentAssets': TotalCurrentAssets=elementValue; break;
			case 'CurrentLiabilities': CurrentLiabilities=elementValue; break;
			case 'CashCashEquivalents':
			case 'CashCashEquivalentsShortTermInvestments': CashCashEquivalentsShortTermInvestments=elementValue; break;
			case 'AccountsReceivableTradeNet':
			case 'AccountsNotesReceivableNet':
			case 'ReceivablesNet': ReceivablesNet=elementValue; break;
			case 'OperatingRevenue': OperatingRevenue=elementValue; break;
			case 'NetIncome': NetIncome=elementValue; break;
			case 'MinorityInterestNetTaxEffect':
			case 'InterestExpense': InterestExpense=elementValue; break;
			default: break;
		}
	}
	// Compute Financial Ratios
	DebtToEquity(LongTermDebt, StockholdersEquity);
	TotalDebt(Liabilities, Assets);
	CurrentRat(TotalCurrentAssets, CurrentLiabilities);
	QuickRat(CashCashEquivalentsShortTermInvestments, ReceivablesNet, CurrentLiabilities);
	CashRat(CashCashEquivalentsShortTermInvestments, CurrentLiabilities);
	OPM(NetIncome, InterestExpense, OperatingRevenue);

	return 0;
}
// determine Debt to Equity ratio
function DebtToEquity(a, b)
{
	if(a==null || b==null)
	{
		printNull('d2e1');
	}
	else
	{
		// long term debt / stockholders equity
		d2er = a/b;
		document.getElementById('d2e1').innerHTML=d2er;
	}
	return 0;
}

// determine Total Debt ratio
function TotalDebt(c, d)
{
	if(c==null || d==null)
	{
		printNull('td1');
	}
	else
	{
		// total liabilities / total assets
		tdr = c/d;
		document.getElementById('td1').innerHTML=tdr;
	}
	return 0;
}
// determine Cash Coverage
/*function CashCoverage(e, f, g)
{
	if(e==null || f==null || g==null)
	{
		printNull(x);
	}
	else
	{
		// multiple names for these items
		// EBIT, depreciation, interest expense
		cc = (IncomeLossContinuingOperationsBeforeIncomeTaxes + TotalDepreciationAmortization)/InterestIncomeExpenseNet;
		document.getElementById('cc1').innerHTML=cc;
	}
	return 0;
}*/
// determine Current Ratio
function CurrentRat(h, i)
{
	if(h==null || i==null)
	{
		printNull('crrntR1');
	}
	else
	{
		// current assets / current liabilities
		crrntr = h/i;
		document.getElementById('crrntR1').innerHTML=crrntr;
	}
	return 0;
}
// determine Quick Ratio
function QuickRat(j, k, l)
{
	if(j==null || k==null || l==null)
	{
		printNull('qckR1');
	}
	else
	{
		// (cash + marketable securities + receivables) / current liabilities
		qckr = (j + k)/l;
		document.getElementById('qckR1').innerHTML=qckr;
	}
	return 0;
}
// determine Cash Ratio
function CashRat(m, n)
{
	if(m==null || n==null)
	{
		printNull('cshR1');
	}
	else
	{
		// (cash + marketable securities) / current liabilities
		cshr = (m)/n;
		document.getElementById('cshR1').innerHTML=cshr;
	}
	return 0;
}
// determine Operating profit margin
function OPM(o, p, q)
{
	if(o==null || p==null || q==null)
	{
		printNull('opm1');
	}
	else
	{
		// (net income + interest) / sales
		opm = (o + p)/q;
		document.getElementById('opm1').innerHTML=opm;
	}
	return 0;
}

/*
// determine return on assets
function ROA()
{
		// asset turnover, operating profit margin
}

// determine the return on equity
function ROE()
{
		// 'leverage ratio' = 1 + debt to equity ratio
	// ' debt burden' = net income / (net income + interest expense)
	// leverage ratio, asset turnover, operating profit margin, debt burden
}
*/
// Clear interface document fields
function clearAll()
{
	// Clear current financial summary fields
	document.getElementById('ni').innerHTML="";
	document.getElementById('ca').innerHTML="";
	document.getElementById('ta').innerHTML="";
	document.getElementById('cl').innerHTML="";
	document.getElementById('tl').innerHTML="";
	document.getElementById('se').innerHTML="";
	//document.getElementById('ltd').innerHTML="";
	// Clear current financial ratio fields
	document.getElementById('d2e1').innerHTML="";
	document.getElementById('td1').innerHTML="";
	//document.getElementById('cc1').innerHTML="";
	document.getElementById('crrntR1').innerHTML="";
	document.getElementById('qckR1').innerHTML="";
	document.getElementById('cshR1').innerHTML="";
	document.getElementById('opm1').innerHTML="";
}
function printNull(x)
{
	document.getElementById(x).innerHTML='-';
	return 0;
}
function checkForEmpty()
{
	var documentElements = ['ni','ca','ta','cl','tl','se'];
	var temp;

	for(i=0; i<=documentElements.length; i++)
	{
		temp=documentElements[i];
		if(document.getElementById(temp)=="")
		{
			printNull(temp);
		}
	}
}