function checkMpegFile() {
	var element_mpeg 	= $('mpeg');
	var filename = element_mpeg.value;
	
	if( filename.length == 0 ) {
		alert('You need to select an MPEG2 file to proceed.');
		return false;
	} else {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename.substr(dot,filename.length).toLowerCase();
			if( extension != '.mpeg' && extension != '.mpg') {
				alert('You must upload an MPEG2 file (current file = '+extension+').');
				return false;
			}
		}
	}
}

/**
 *
 *
 */
function checkFileTypevideo(extra_fields) {
	var element_mpeg 	= $('mpeg');
	var element_mov 	= $('mov');
  	
  	var filename = element_mpeg.value;
	if( filename.length == 0 ) {
		alert('You need to select an MPEG2 file to proceed.');
		return false;
	} else {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename.substr(dot,filename.length).toLowerCase();
			if( extension != '.mpeg' && extension != '.mpg') {
				alert('You must upload an MPEG2 file (current file = '+extension+').');
				return false;
			}
		}
	}

	if(extra_fields==1) {
		var ratio_mpeg = $('ratio_mpeg').value;
		if(ratio_mpeg.length == 0) {
			alert('Please select the Aspect Ratio of your MPEG2 File before proceeding.');
			return false;
		}

		if( $('standard_mpeg').value == 'Unspecified' ) {
			alert('Please select the TV Standard of your MPEG2 File before proceeding.');
			return false;
		}
	}

	var filename2 = element_mov.value;
	if( filename2.length == 0 ) {
		alert('You need to select an Quicktime file to proceed.');
		return false;
	} else {
		var dot = filename2.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename2.substr(dot,filename.length).toLowerCase();
			if( extension != '.mov') {
				alert('You must upload an Quicktime file (current file = '+extension+').');
				return false;
			}
		}
	}
  
	if(extra_fields==1) {
		var ratio_mov = $('ratio_mov').value;
		if( ratio_mov.length == 0 ) {
			alert('Please select the Aspect Ratio of your Quicktime File before proceeding.');
			return false;
		}
		if( $('standard_mov').value == 'Unspecified') {
			alert('Please select the TV Standard of your Quicktime File before proceeding.');
			return false;
		}
	}
}

function checkIfVideo() {
	var element 	= $('video');

	var filename = element.value;
	if( filename.length == 0 ) {
		alert('You need to select an MPEG2 or Quicktime file to proceed.');
		return false;
	} else {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename.substr(dot,filename.length).toLowerCase();
			if( extension != '.mpeg' && extension != '.mpg' && extension != '.mov') {
				alert('You must upload an MPEG2 or Quicktime file (current file extension is '+extension+').');
				return false;
			}
		}
	}
}

/**
 *
 *
 */
function checkFileTypempeg(extra_fields) {
	var element_mpeg = $('mpeg');
	
	var filename = element_mpeg.value;
	if( filename.length == 0 ) {
		alert('You need to select an MPEG2 file to proceed.');
		return false;
	} else {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename.substr(dot,filename.length).toLowerCase();
			if( extension != '.mpeg' && extension != '.mpg') {
				alert('You must upload an MPEG2 file (current file = '+extension+').');
				return false;
			}
		}
	}

	if(extra_fields==1) {
		var ratio_mpeg = $('ratio_mpeg').value;
		if(ratio_mpeg.length == 0) {
			alert('Please select the Aspect Ratio of your MPEG2 File before proceeding.');
			return false;
		}

		if( $('standard_mpeg').value == 'Unspecified' ) {
			alert('Please select the TV Standard of your MPEG2 File before proceeding.');
			return false;
		}
	}
}

/**
 *
 *
 */
function checkFileTypewavmpeg(extra_fields) {
	var element_mpeg = $('wavmpeg');

	var filename = element_mpeg.value;
	if( filename.length == 0 ) {
		alert('You need to select an WAV, MP3 or MPEG2 file to proceed.');
		return false;
	} else {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename.substr(dot,filename.length).toLowerCase();
			if( extension != '.mpeg' && extension != '.mpg'  && extension != '.mp3' && extension != '.wav') {
				alert('You must upload an WAV, MP3 or MPEG2 file (current file = '+extension+').');
				return false;
			}
		}
	}
}

/**
 *
 *
 */
function checkFileTypemov(extra_fields) {
	var element_mov = $('mov');

	var filename2 = element_mov.value;
	if( filename2.length == 0 ) {
		alert('You need to select a Quicktime File to proceed.');
		return false;
	} else {
		var dot = filename2.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
    	} else {
			var extension = filename2.substr(dot,filename2.length).toLowerCase();
			if( extension != '.mov') {
				alert('You must upload an Quicktime file (current file = '+extension+').');
				return false;
			}
		}
	}
	
	if(extra_fields==1) {
		var ratio_mov = $('ratio_mov').value;
		if( ratio_mov.length == 0 ) {
			alert('Please select the Aspect Ratio of your Quicktime File before proceeding.');
			return false;
		}

		if( $('standard_mov').value == 'Unspecified') {
			alert('Please select the TV Standard of your Quicktime File before proceeding.');
			return false;
		}
	}
}

/**
 *
 *
 */
function checkFileTypeprint() {
	var element_mpeg 	= $('imagepdf');
	var element_mov 	= $('image');

	var filename = element_mpeg.value;
	if( filename.length == 0 ) {
		alert('You need to select an PDF or Image file to proceed.');
		return false;
	} else {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
	  	} else {
			var extension = filename.substr(dot,filename.length).toLowerCase();
			if( extension != '.tif' && extension != '.tiff' && extension != '.jpg' && extension != '.jpeg' && extension != '.gif' && extension != '.pdf' && extension != '.png') {
				alert('You must upload a PDF or Image file (current file = '+extension+').');
				return false;
			}
		}
	}

	var filename2 = element_mov.value;
	if( filename2.length == 0 ) {
		alert('You need to select an Image file to proceed.');
		return false;
	} else {
		var dot = filename2.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename2.substr(dot,filename.length).toLowerCase();
			if( extension != '.tif' && extension != '.tiff' && extension != '.jpg' && extension != '.jpeg' && extension != '.gif' && extension != '.png') {
				alert('You must upload an Image file (current file = '+extension+').');
				return false;
			}
		}
	}
}

/**
 *
 *
 */
function checkFileTypeprint1() {
	var element_mpeg 	= $('print1');

	var filename = element_mpeg.value;
	if( filename.length == 0 ) {
		alert('You need to select an PDF or Image file to proceed.');
		return false;
	} else {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename.substr(dot,filename.length).toLowerCase();
			if( extension != '.tif' && extension != '.tiff' && extension != '.jpg' && extension != '.jpeg' && extension != '.gif' && extension != '.pdf' && extension != '.png') {
				alert('You must upload a PDF or Image file (current file = '+extension+').');
				return false;
			}
		}
	}
}

/**
 *
 *
 */
function checkFileTypeprint2() {
	var element_mpeg 	= $('print2');

	var filename = element_mpeg.value;
	if( filename.length == 0 ) {
		alert('You need to select an Image file to proceed.');
		return false;
	} else {
		var dot = filename.lastIndexOf(".");
		if( dot == -1 ) {
			alert('Could not determine the file type. Please select other file.');
			return false;
		} else {
			var extension = filename.substr(dot,filename.length).toLowerCase();
			if( extension != '.tif' && extension != '.tiff' && extension != '.jpg' && extension != '.jpeg' && extension != '.gif' && extension != '.png') {
				alert('You must upload an Image file (current file = '+extension+').');
				return false;
			}
		}
	}
}