function validateData(){

	var txtFirstName		= getElementById( "FIRST_NAME"			);
	var txtLastName			= getElementById( "LAST_NAME"			);
	var txtEmail			= getElementById( "EMAIL"				);
	var txtPhoneAreaCode	= getElementById( "PHONE_AREA_CODE"	);
	var txtPhoneLocalCode	= getElementById( "PHONE_LOCAL_CODE"	);
	var txtPhoneNumber		= getElementById( "PHONE_NUMBER"		);
	var txtComments			= getElementById( "COMMENTS"			);
	var sPhoneValue			= txtPhoneAreaCode.value + txtPhoneLocalCode.value + txtPhoneNumber.value;
	var bRequirementsMet	= true;
	
	if( txtFirstName.value.length == 0 && txtLastName.value.length == 0 ) {
		bRequirementsMet = false;
	}
	if( bRequirementsMet && ( txtEmail.value.length == 0 && sPhoneValue.length == 0 ) ) {
		bRequirementsMet = false;
	}
	if( !bRequirementsMet ) {
		window.alert( "\nPlease enter your FIRST NAME or LAST NAME\nand\nPHONE NUMBER or EMAIL ADDRESS.\n" );
	} 
	else {
		if( sPhoneValue.length > 0 && ( txtPhoneAreaCode.value.length != 3 || txtPhoneLocalCode.value.length != 3 || txtPhoneNumber.value.length != 4 ) ) {
			bRequirementsMet = false;
			window.alert( "\nYou have entered an invalid phone number. Please enter a correct phone number.\n" );
		}
		if( bRequirementsMet && txtEmail.value.length > 0 ) {
			var nAtSymbolIndex = txtEmail.value.indexOf( "@" );
			var sUserName      = "";
			var sServerName    = "";
			if( nAtSymbolIndex > 0 && nAtSymbolIndex < txtEmail.value.length - 1 ) {
				sUserName = txtEmail.value.substring( 0, nAtSymbolIndex );
				sServerName = txtEmail.value.substring( nAtSymbolIndex + 1 );
				nAtSymbolIndex = sServerName.indexOf( "." );
			}
			if( nAtSymbolIndex == -1 || sUserName.length == 0 || sServerName.length == 0 ) {
				window.alert( "You have entered an invalid email address. Please enter a correct email address." );
				bRequirementsMet = false;
			}
		}
		var txtZip = getElementById( "ZIP" );
		if( txtZip != null ) txtZip.value = txtZip.value.toUpperCase();
		txtZip = getElementById( "SELLER_ZIP" );
		if( txtZip != null ) txtZip.value = txtZip.value.toUpperCase();
		if( typeof( txtComments ) != "undefined" && txtComments != null && txtComments.value.length > 2900 ) {
			bRequirementsMet = false;
			window.alert( "\nYour comments are too long.  Please try to limit the length of your comments to 2900 characters.\n" );
		}

	}
	// The SELLER minimum price must be less than or equal to the maximum price.
	if( bRequirementsMet ) {
		var txtMinPrice = getElementById( "SELLER_MIN_PRICE" );
		var txtMaxPrice = getElementById( "SELLER_MAX_PRICE" );
		if( typeof( txtMinPrice ) != "undefined" && txtMinPrice != null && typeof( txtMaxPrice ) != "undefined" && txtMaxPrice != null ) {
			var sMinPrice = txtMinPrice.value;
			var sMaxPrice = txtMaxPrice.value;
			// Pre-parse the string to remove any non digit characters
			sMinPrice = sMinPrice.replace( /\$|\+|,/g,			"" );
			sMaxPrice = sMaxPrice.replace( /\$|\+|,/g,			"" );
			// Convert from a string to a number.
			var nMinPrice = new Number( sMinPrice );
			var nMaxPrice = new Number( sMaxPrice );
			if( sMinPrice.length != 0 && sMaxPrice.length != 0 ) {
				if( nMinPrice != Number.NaN && nMaxPrice != Number.NaN && nMinPrice > nMaxPrice ) {
					window.alert( "\nYou have specified an invalid minimum or maximum price.  Please\nensure that the minimum price is not greater than the maximum price\nin the price range section.\n" )
					bRequirementsMet = false;
				}
			}
		}
	}
	
	// The BUYER minimum price must be less than or equal to the maximum price.
	if( bRequirementsMet ) {
		var txtMinPrice = getElementById( "BUYER_MIN_PRICE" );
		var txtMaxPrice = getElementById( "BUYER_MAX_PRICE" );
		if( typeof( txtMinPrice ) != "undefined" && txtMinPrice != null && typeof( txtMaxPrice ) != "undefined" && txtMaxPrice != null ) {
			var sMinPrice = txtMinPrice.value;
			var sMaxPrice = txtMaxPrice.value;
			// Pre-parse the string to remove any non digit characters
			sMinPrice = sMinPrice.replace( /\$|\+|,/g,			"" );
			sMaxPrice = sMaxPrice.replace( /\$|\+|,/g,			"" );
			// Convert from a string to a number.
			var nMinPrice = new Number( sMinPrice );
			var nMaxPrice = new Number( sMaxPrice );
			if( nMinPrice != Number.NaN && nMaxPrice != Number.NaN && nMinPrice > nMaxPrice ) {
				window.alert( "\nYou have specified an invalid minimum or maximum price.  Please\nensure that the minimum price is not greater than the maximum price\nin the price range section.\n" )
				bRequirementsMet = false;
			}

		}
	}
	return bRequirementsMet;
}

// Retrieve an element by it's ID attribute
// NOTE: This function is used in place of
//  'document.getElementById() to support
//  Internet Explorer 4.01.
function getElementById( id ) {
	if( typeof( document.getElementById ) == "undefined" ) {
		for( var i = 0; i < document.all.length; i++ ) {
			var el = document.all( i );
			if( el.id == id ) {
				return el;
			}
		}
	}
	else {
		return document.getElementById( id );
	}
}


// Initialize the document
function init() {
	var statusSeller	= getElementById( "STATUS_SELLER"	);
	var statusBoth		= getElementById( "STATUS_BOTH"		);
	var status = "Buyer";
	if( statusSeller.checked ) {
		status = "Seller";
	} 
	else if ( statusBoth.checked ) {
		status = "Both";
	}
	enableSection( status );
	size( getElementById( "TABLE_PICTURES" ) );
	var backgroundImage = getElementById( "BACKGROUND_IMAGE" );
	if( typeof( backgroundImage ) != "undefined" && backgroundImage != null ) {
		backgroundImage.style.visibility = "visible";
	}
	enableAddressFields( false );
}

function size( objTable ) {
	var backgroundImage = getElementById( "BACKGROUND_IMAGE" );
	if( typeof( backgroundImage ) != "undefined" && backgroundImage != null && typeof( objTable ) != "undefined" && objTable != null ) {
		backgroundImage.style.left   = objTable.offsetLeft;
		backgroundImage.style.top    = objTable.offsetTop;
		backgroundImage.style.width  = objTable.offsetWidth;
		backgroundImage.style.height = objTable.offsetHeight;
	}
}

// Enable the Buyer, Seller or both sections
function enableSection( section ) {
	setControl( getElementById( "SELLER_MIN_PRICE"					), section == "Buyer" );
	setControl( getElementById( "SELLER_MAX_PRICE"					), section == "Buyer" );
	setControl( getElementById( "SELLER_SQUAREFEET"					), section == "Buyer" );
	setControl( getElementById( "SELLER_BEDROOMS"					), section == "Buyer" );
	setControl( getElementById( "SELLER_BATHROOMS"					), section == "Buyer" );
	setControl( getElementById( "SELLER_AGE"						), section == "Buyer" );
	setControl( getElementById( "SELLER_FEATURES"					), section == "Buyer" );
	setControl( getElementById( "SELLER_LOCATION_SAME_ADDRESS"		), section == "Buyer" );
	setControl( getElementById( "SELLER_HOUSE_NO"					), section == "Buyer" );
	setControl( getElementById( "SELLER_STREET_NAME"				), section == "Buyer" );
	setControl( getElementById( "SELLER_SUITE_NO"					), section == "Buyer" );
	setControl( getElementById( "SELLER_CITY"						), section == "Buyer" );
	setControl( getElementById( "SELLER_STATE"						), section == "Buyer" );
	setControl( getElementById( "SELLER_ZIP"						), section == "Buyer" );
	setControl( getElementById( "SELLER_COUNTY"						), section == "Buyer" );
	setControl( getElementById( "SELLER_AREA"						), section == "Buyer" );
	setControl( getElementById( "SELLER_LOCATION"					), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER"						), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER_MIN_PRICE"				), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER_MAX_PRICE"				), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER_SQUAREFEET"				), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER_BEDROOMS"				), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER_BATHROOMS"				), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER_AGE"					), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER_FEATURES"				), section == "Buyer" );
	setControl( getElementById( "TXT_SELLER_LOCATION"				), section == "Buyer" );
	setControl( getElementById( "BUYER_MIN_PRICE"		), section == "Seller", "$0" );
	setControl( getElementById( "BUYER_MAX_PRICE"		), section == "Seller", "no maximum" );
	setControl( getElementById( "BUYER_SQUAREFEET"		), section == "Seller", "0-999"	);
	setControl( getElementById( "BUYER_BEDROOMS"		), section == "Seller", "1"		);
	setControl( getElementById( "BUYER_BATHROOMS"		), section == "Seller", "1"		);
	setControl( getElementById( "BUYER_AGE"				), section == "Seller", "0-9"	);
	setControl( getElementById( "BUYER_FEATURES"		), section == "Seller" );
	setControl( getElementById( "BUYER_LOCATION"		), section == "Seller" );
	setControl( getElementById( "BUYER_CITY"			), section == "Seller" );
	setControl( getElementById( "BUYER_STATE"			), section == "Seller" );
	setControl( getElementById( "BUYER_COUNTY"			), section == "Seller" );
	setControl( getElementById( "BUYER_AREA"			), section == "Seller" );
	setControl( getElementById( "TXT_BUYER"				), section == "Seller" );
	setControl( getElementById( "TXT_BUYER_MIN_PRICE"	), section == "Seller" );
	setControl( getElementById( "TXT_BUYER_MAX_PRICE"	), section == "Seller" );
	setControl( getElementById( "TXT_BUYER_SQUAREFEET"	), section == "Seller" );
	setControl( getElementById( "TXT_BUYER_BEDROOMS"	), section == "Seller" );
	setControl( getElementById( "TXT_BUYER_BATHROOMS"	), section == "Seller" );
	setControl( getElementById( "TXT_BUYER_AGE"			), section == "Seller" );
	setControl( getElementById( "TXT_BUYER_FEATURES"	), section == "Seller" );
	setControl( getElementById( "TXT_BUYER_LOCATION"	), section == "Seller" );
	enableAddressFields( false );
}

function enableAddressFields( clearValues ) {
	var objCheckbox = getElementById( "SELLER_LOCATION_SAME_ADDRESS" );
	var objRadio = getElementById( "STATUS_BUYER" );
	if( typeof( objCheckbox ) == "undefined" || objCheckbox == null ) {
		return;
	}
	if( typeof( objRadio ) == "undefined" || objRadio == null ) {
		return;
	}
	var disable = objRadio.checked || objCheckbox.checked;
	var ctrlHouseNo		= getElementById( "SELLER_HOUSE_NO"    );
	var ctrlStreetName	= getElementById( "SELLER_STREET_NAME" );
	var ctrlSuiteNo		= getElementById( "SELLER_SUITE_NO"    );
	var ctrlCity		= getElementById( "SELLER_CITY"        );
	var ctrlState		= getElementById( "SELLER_STATE"       );
	var ctrlZip			= getElementById( "SELLER_ZIP"         );
	
	setControl( ctrlHouseNo,	disable );
	setControl( ctrlStreetName,	disable );		
	setControl( ctrlSuiteNo,	disable );
	setControl( ctrlCity,		disable );
	setControl( ctrlState,		disable );
	setControl( ctrlZip,		disable );
	setControl( getElementById( "TXT_SELLER_HOUSE_NO"		), disable );
	setControl( getElementById( "TXT_SELLER_STREET_NAME"	), disable );
	setControl( getElementById( "TXT_SELLER_SUITE_NO"		), disable );
	setControl( getElementById( "TXT_SELLER_CITY"			), disable );
	setControl( getElementById( "TXT_SELLER_STATE"			), disable );
	setControl( getElementById( "TXT_SELLER_ZIP"			), disable );
	
	if( disable ) {
		setValue( ctrlHouseNo,		"HOUSE_NO"		);
		setValue( ctrlStreetName,	"STREET_NAME"	);
		setValue( ctrlSuiteNo,		"SUITE_NO"		);
		setValue( ctrlCity,			"CITY"			);
		setValue( ctrlState,		"STATE"			);
		setValue( ctrlZip,			"ZIP"			);
	}
	else if( typeof( clearValues ) == "undefined" ) {
		clearValue( ctrlHouseNo		);
		clearValue( ctrlStreetName	);
		clearValue( ctrlSuiteNo		);
		clearValue( ctrlCity		);
		clearValue( ctrlState		);
		clearValue( ctrlZip			);
	}
}


function clearValue( obj ) {
	if( typeof( obj ) != "undefined" && obj != null ) {
		obj.value = "";
	}
}

function setValue( obj, name ) {
	var obj2 = getElementById( name );
	if( typeof( obj ) != "undefined" && obj != null && typeof( obj2 ) != "undefined" && obj2 != null ) {
		var width = obj.offsetWidth;	
		obj.value = obj2.value;	obj.style.width = width;
	}
}

function setControl( control, disable, value ) {if( typeof( control ) != "undefined" && control != null ) {	control.disabled = disable;	if( disable ) {		control.value = typeof( value ) == "undefined" ? "" : value;		if( control.checked ) {			control.checked = false;		}	}}
}

function moveToNextField( id ) {if( window.event.keyCode != 9 ) {	if( getElementById( id ).value.length == 3 ) {		if( id == "PHONE_AREA_CODE" ) {			getElementById( "PHONE_LOCAL_CODE" ).focus();		}		else if( id == "PHONE_LOCAL_CODE" ) {			getElementById( "PHONE_NUMBER" ).focus();		}	}}
}

function allowKeys( obj, keys ) {var bAllowKey = false;for( var i = 0; i < keys.length; i++ ) {	if( keys.charAt( i ) == String.fromCharCode( window.event.keyCode ) ) {		bAllowKey = true;		break;	}}if( !bAllowKey ) {	window.event.cancelBubble = true;	window.event.keyCode = 0;}
}

function validateInput( obj, keys ) {
	if( typeof( window.clipboardData ) != "undefined" ) {	
		var sData = window.clipboardData.getData( "Text" );	
		var sTemp = "";	
		if( typeof( sData ) != "undefined" ) {
			for( var i = sData.length; --i >= 0; ) {
				for( var j = keys.length; --j >= 0; ) {	
					if( sData.charAt( i ) == keys.charAt( j ) ) {
						sTemp += sData.charAt( i );				
					}			
				}		
			}	
		}	
		window.clipboardData.setData( "Text", sTemp );
	}
}

function Submit()
{
	if( validateData() ) {
		getElementById( "SUBMIT" ).disabled = true;
		var pForm = getElementById( "frmMain" );
		pForm.submit();
	}
}

function enableBestTime() {var txtPhoneArea	= getElementById( "PHONE_AREA_CODE"		);var txtPhoneLocal	= getElementById( "PHONE_LOCAL_CODE"	);var txtPhoneNumber	= getElementById( "PHONE_NUMBER"		);var obgBestTime		= getElementById( "BEST_TIME"			);

if( typeof( txtPhoneArea ) != "undefined" && txtPhoneArea != null && typeof( obgBestTime ) != "undefined" && obgBestTime != null ) {	obgBestTime.disabled = !( txtPhoneArea.value.length != 0 || txtPhoneLocal.value.length != 0 || txtPhoneNumber.value.length != 0 );}
}