//<!--

//---------------------------------------------------------------------------
//
// File	:    DHTMLCal.js
//
// Purpose	: This is the source file for the DHTML Calendar
//  Author	: Bryan M. Latimore
//
// Date     	: 05/07/01
// ----------  ---  ----------------------------------------------------------

//---------------------------------------------------------------------------

/*
 font point size chart
 size 1 	=  8pt
 size 2		= 10pt
 size 3		= 12pt
 size 4		= 14pt
 size 5		= 18pt
 size 6		= 24pt
*/

// ---------------------------------------------------------------------------
// initialization

var R = "\r\n";

var mclrBlack =		"#000000";
var mclrWhite =		"#ffffff";
var mclrDeadWhite = 	"#fffffe";
var mclrOffWhite = 	"#e1e1e1";
var mclrLightGray = 	"#c0c0c0";
var mclrGray =		"#888888";

var mclrYellow =     "#ffe1c0";
var mclrPurple =	"#ff00ff";
var mclrBlue =		"#0000ff";
var mclrRed =		"#ff0000";
var mclrGreen =		"#00ff00";
var mclrPink =		"#ffc0c0";

var mclrLightYellow =	"#ffffc0";
var mclrLightOrange =	"#e1e1c0";

var mclrDarkPurple =	"#880088";
var mclrDarkBlue =	"#000088";
var mclrDarkRed =	"#880000";
var mclrDarkGreen =	"#008800";

// ---------------------------------------------------------------------------
// custom sizes, colors and fonts

var mclrTableBg  = "" //mclrDeadWhite;     // table background DO NOT CHANGE
var mclrDead	 = mclrLightGray;     // background date cell color - unused this month
var mclrNow	 	 = mclrLightYellow;   // background date cell color - the current date
var mclrPast	 = mclrOffWhite;      // background date cell color - previous dates
var mclrFuture	 = mclrWhite;         // background date cell color - future dates
var mclrBorder	 = mclrDarkRed;       // border color of calendar

var mnCellWidth  = 88;               // width of weekday columns and dates
var mnCellHeight = 110;                // height of date cells 

// font sizes and colors for the weekday headers (Mon, Tues, Wed...)
var mclrHdrBg	  = "#000000"
var mclrHdrText	  = mclrWhite;
var mstrHdrFace   = "Verdana, Arial, Helvetica, Sans Serif";
var mstrHdrSize   = "1";

// font sizes and colors for date (1st, 3rd, 15th...)
var mclrNumText	  = "#000000"
var mstrNumFace   = "Verdana, Arial, Helvetica, Sans Serif";
var mstrNumSize   = "1";

// font sizes and colors for the event text
var mclrCellText   = mclrBorder;
var mstrCellFace   = "Verdana, Arial, Helvetica, Sans Serif";
var mstrCellSize   = "1";

var maDaysPerMonth = new Array( 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ); 
var maLongDays	   = new Array( "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
var maLongMonths   = new Array( "January", "February", "March", "April",
	 		"May", "June", "July", "August", 
			"September", "October", "November", "December" );

var maYear = new Array();
var maMonth = new Array();
var maDay = new Array();
var maText = new Array();

var mstrBrowserName = DHTMLCal_BrowserName();
var mstrBrowserVer = DHTMLCal_BrowserVer();

// ---------------------------------------------------------------------------------------
function DHTMLCal_SetEvent( m, d, y, strText) {
	var x = maDay.length;

	maYear[x +1]   = y;
	maMonth[x + 1] = m-1;
	maDay[x + 1]   = d;
	maText[x + 1]  = strText;
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_GetEvent( m, d, y ) {
	var x = 0;
	while( x < maDay.length ) {
		if ( y == maYear[x] ) {
			if ( m == maMonth[x] ) {
				if ( d == maDay[x] ) { 
					return maText[x];
				}
			}
		}
		x++;
	}
	return "&nbsp";
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_CheckLeapYear(m, y) {
	var x = 2;	

	if ( m == x ) {
        	if ( y % 4 == 0 ) {
               		if ( y % 100 == 0) {
                    		if ( y % 400 == 0) maDaysPerMonth[x] = 29;
               		} else {
                    		maDaysPerMonth[x] = 29;
			}
		}
	}
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_FillMonth( m ) {
	var strHTML = "";

	for ( i=0; i<=11; i++ ) {
		var strSelected = "";
		if ( i == m ) strSelected = "selected";

		strHTML = strHTML + "<option value='" + i + "' " + strSelected + " >" + maLongMonths[i] + "</option>" + R;
	};
	return strHTML;
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_FillYear( y ) {
	var strHTML = "";

	for ( i=y-1; i<=y+5; i++ ) {
		var strSelected = "";
		if ( i == y ) strSelected = "selected";

		strHTML = strHTML + "<option value='" + i + "' " + strSelected + " >" + i + "</option>" + R;
	};
	return strHTML;
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_Form() {
	var strHTML;
	var strTag;	
	var strOutput = "";
	
	var m = DHTMLCal_GetDate("m");
	var y = DHTMLCal_GetDate("y");

	// ----- begin form
	strHTML = "<form name='frmCal' method='post' action=''>" + R;
	strOutput = strOutput + strHTML;

	// ----- begin table
	strHTML = "<table align=right"
		//+ " width='" + (mnCellWidth * 7) + "'"
		+ " >" + R;
	strOutput = strOutput + strHTML;

	// ----- month & year selector
	strHTML = "<tr><td"
		//+ " bgcolor=" + mclrHdrBg
		+ " >" + R + R;
	strOutput = strOutput + strHTML;

	// ----- month combo
	strHTML = "<select name='cboMonth'"
		+ " onchange='DHTMLCal_Update("
		+ " cboMonth.options[frmCal.cboMonth.selectedIndex].value,"
		+ " cboYear.options[frmCal.cboYear.selectedIndex].value);'>" + R
		+ DHTMLCal_FillMonth(m)
		+ "</select>" + R + R;
	strOutput = strOutput + strHTML;

	// ----- year combo
	strHTML = "&nbsp"
		+ "<select name='cboYear'"
		+ " onchange='DHTMLCal_Update("
		+ " cboMonth.options[frmCal.cboMonth.selectedIndex].value,"
		+ " cboYear.options[frmCal.cboYear.selectedIndex].value);'>" + R
		+ DHTMLCal_FillYear(y)
		+ "</select>" + R + R;
	strOutput = strOutput + strHTML;

	strHTML = "</td></tr>" + R + "</table></form>" + R + R;
	strOutput = strOutput + strHTML;

	document.writeln(strOutput);
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_Draw() {
	var obj;
	var sHTML;

	var m = DHTMLCal_GetDate("m");
	var y = DHTMLCal_GetDate("y");

	strHTML = DHTMLCal_Create( m, y );

	if ( mstrBrowserName == "IE" ) {
		// microsoft internet explorer (handle ver 4 & 5)
		document.writeln(strHTML);
	
	} else if ( mstrBrowserName == "NS" ) {
		if ( mstrBrowserVer < "5" ) {
			// netscape version 4
			document.CALLAYER.document.writeln(strHTML);
			
		} else {
			// netscape version 5 and up		
			obj = document.getElementById("CALDIV");
			DHTMLCal_SetInnerHTML(obj, strHTML);
		};
	};
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_Update(m, y) {
	var strNewText;
	var obj;
	var strHTML;

	// write the current month and year to a cookie
	// will expire in one hour
	DHTMLCal_SetDate(m, y)

	strHTML = DHTMLCal_Create( m, y );

	if ( mstrBrowserName == "IE" ) {
		// microsoft internet explorer (handle ver 4 & 5)
		document.all["CALDIV"].innerHTML = strHTML;
	
	} else if ( mstrBrowserName == "NS" ) {
		if ( mstrBrowserVer < "5" ) {
			// netscape version 4
			document.CALLAYER.document.write(strHTML);
			document.CALLAYER.document.close();
			
		} else {
			// netscape version 5 and up		
			obj = document.getElementById("CALDIV");
			DHTMLCal_SetInnerHTML(obj, strHTML);
		};
	};
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_CheckColor( j, i, x, dteCal, dteNow, m ) {
	var strID = "r" + i + "c" + j; 
	var currD = dteCal.getDay();
	var currM = dteCal.getMonth();
	var currY = dteCal.getYear();

	// Is this a "dead" cell?
	if ( currD > (i + x) || currM != m ) {
		return mclrDead;
	} else {
		if ( dteCal.getYear() < dteNow.getYear()) {
			return mclrPast;
		} else if (dteCal.getYear() > dteNow.getYear()) {
			return mclrFuture;
		} else {				
			// Same year...
			if (dteCal.getMonth() < dteNow.getMonth() ) {
				return mclrPast;
			} else if (dteCal.getMonth() > dteNow.getMonth() ) {
				return mclrFuture;
			} else {
				// Same month...
				if (dteCal.getDate() < dteNow.getDate()) {
					return mclrPast;
				} else if (dteCal.getDate() > dteNow.getDate()) {
					return mclrFuture;
				} else {
					return mclrNow;
				}
			}
		}
	}
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_Create( m, y ) {
	var strOutput = "";
	var strHTML;
	var strID;
	var nColor;
	var strCell;
	var strNum;
	var strText;
	var strTag;	

	var dteNow = new Date();
	var dteCal = new Date(y, m, 1);
	DHTMLCal_CheckLeapYear(m, y);

	// ----- find the first day and subrtact back to Sun
	dteCal.setDate( dteCal.getDate() - dteCal.getDay() );

	// ----- begin table
	strHTML = "<table align=right"
		//+ " bgColor=" + mclrTableBg
		+ " border='0'"
		+ " bordercolor='" + mclrDarkPurple + "'"
		+ " bordercolordark='" + mclrDarkPurple + "'"
		+ " bordercolorlight='" + mclrDarkPurple + "'"
		+ " width='" + (mnCellWidth * 7) + "'"
		+ " cellspacing=1>";
	strOutput = strOutput + strHTML + R + R;

	// ----- Create the WEEKDAY headers
	strOutput = strOutput + "<tr>" + R;
	for( i = 0; i < 7; i++) {
		strHTML = "<td align=center"
			+ " width='" + mnCellWidth + "'"
			+ " bgcolor=" + mclrHdrBg
			+ " >"
			+ DHTMLCal_FontStr( mstrHdrFace, mstrHdrSize, mclrHdrText )
			+ " <b><center>" + maLongDays[i]
			+ " </center></b></font></td>";
		strOutput = strOutput + strHTML + R;
	}
	strOutput = strOutput + "</tr>" + R + R;

	// ----- now create calendar grid ( 7 columns by 6 rows ) 
	for (j = 0; j < 6; j++)	{

		x = 0;
		strOutput = strOutput + "<tr>"; // + R;
		for( i = 0; i < 7; i++) {

			// ----- create unique ID
			strID = "r" + i + "c" + j; 

			// ----- determine color and text
			nColor = DHTMLCal_CheckColor( j, i, x, dteCal, dteNow, m );
			if (nColor == mclrDead) {
				strCell="&nbsp;";
			} else {
				strNum = dteCal.getDate();
				strText = DHTMLCal_GetEvent(dteCal.getMonth(), dteCal.getDate(), dteCal.getFullYear());
				if (strText=="") strText=" ";
				strCell = DHTMLCal_FontStr(mstrNumFace, mstrNumSize, mclrNumText)
					+ "<strong>" + strNum + "</strong></font>"
					+ "<br>"
					+ DHTMLCal_FontStr(mstrCellFace, mstrCellSize, mclrCellText)
					+ strText + "</font>";
			}
	
			// ----- HTML for cell
			strHTML = "<td valign=top" 
				+ " width=" + mnCellWidth 
				+ " height=" + mnCellHeight 
				+ " bgcolor=" + nColor
				+ " >";
			strOutput = strOutput + strHTML + strCell + "</td>" + R;
		
			dteCal.setDate( dteCal.getDate() + 1 );
		}
		x = x + 7;
		strOutput = strOutput + "</tr>" + R + R;
	}
	

	// ---- end the table, form
	strOutput = strOutput + "</table>";

	return strOutput;
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_FontStr ( strFace, strSize, strColor ) {
	var strHTML = "<font"
		+ " face='"  + strFace  + "'"
		+ " size='"  + strSize  + "'"
		+ " color='" + strColor + "'"
		+ " >";
	return strHTML;
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_BrowserName () {
	var strOutput="";
	var strBrowser = navigator.appName;

	if ( strBrowser=="Microsoft Internet Explorer" ) {
		strOutput = "IE";
	} else if ( strBrowser=="Netscape" ) {
		strOutput = "NS";
	};
	return strOutput;
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_BrowserVer () {
	var strVer = navigator.appVersion.charAt(0);
	return strVer;
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_SetOuterHTML (obj, strHTML) {
	var range = document.createRange();
	range.setStartBefore(obj);

	var df = range.createContextualFragment(strHTML);
	obj.parentNode.replaceChild(df, this);
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_SetInnerHTML (obj, strHTML) {
	var range = document.createRange();
	range.selectNodeContents(obj);
	range.deleteContents();
	
	var df = range.createContextualFragment(strHTML);
	obj.appendChild(df);
}

// ---------------------------------------------------------------------------------------
function DHTMLCal_SetDate (m, y) {
	var strYear =  y.toString();
	var strMonth = m.toString();

	if (strMonth.length==1) strMonth = "0" + strMonth;

	DHTMLCal_CookieSet("dhtmlcal", strYear + strMonth);
};

// ---------------------------------------------------------------------------------------
function DHTMLCal_GetDate (strOption) {
	var strValue = DHTMLCal_CookieGet("dhtmlcal");
	var m, strM
	var y, strY

	if (strValue==false) {
		var dCurrDate = new Date();
		m = dCurrDate.getMonth();
		y = dCurrDate.getFullYear();
	} else {
		strM = strValue.substring(4, 6);
		strY = strValue.substring(0, 4);

		m = parseInt(strM);
		y = parseInt(strY);
		
		if (strM != m.toString()) {
			strM = strM.substring(strM.lastIndexOf("0")+1,strM.lastIndexOf("0")+2);
			m = parseInt(strM);
		};
	};

	if (strOption=="m") return m;
	if (strOption=="y") return y;

	return -1;
};

// ---------------------------------------------------------------------------------------
function DHTMLCal_CookieSet (strName, strValue, hours, strPath, strDomain, strSecure) {
	var numHours;

	if ( (typeof(hours) == 'string') && Date.parse(hours) ) { 
		// already a Date string
		numHours = hours;
	} else if (typeof(hours) == 'number') { 
		// calculate Date from number of hours
		numHours = (new Date((new Date()).getTime() + hours*3600000)).toGMTString();
	};

	// Set the cookie, adding any parameters that were specified.
  	document.cookie = strName + "=" + escape(strValue)
  		+ ((numHours == null) ? "" : "; expires=" + numHours) 
  		+ ((strPath == null) ? "" : "; strPath=" + strPath) 
  		+ ((strDomain == null) ? "" : "; strDomain=" + strDomain)
  		+ ((strSecure == null) ? "" : "; strSecure");
};

// ---------------------------------------------------------------------------------------
function DHTMLCal_CookieGet (strName) {
	var strData;
	var nBegin;
	var nEnd;

	var MyCookie = document.cookie;
	
	if (MyCookie.length>0) {
		nBegin = MyCookie.indexOf(strName);
		if (nBegin != -1) {
			nBegin += strName.length;
			nEnd = MyCookie.indexOf(";", nBegin);
			if (nEnd==-1) nEnd = MyCookie.length;
			strData = unescape(MyCookie.substring(nBegin+1, nEnd));
			return strData;
		} else {
			//no cookie of name found		
			return false;
		};
	} else {
		//no cookie found
		return false;
	};
	
};

//-->