function checkFile1() {
	var strFile1 = document.BHG_Contractor_Application.Attachment1.value;
  	str1 = strFile1.substring(strFile1.lastIndexOf(".") + 1,strFile1.length);
  	if(str1 != "bmp" && str1 != "BMP" && str1 != "Bmp" && str1 != "gif" && str1 != "GIF" && str1 != "Gif" && str1 != "jpeg" && str1 != "JPEG" && str1 != "Jpeg" && str1 != "jpg" && str1 != "JPG" && str1 != "Jpg" && str1 != "png" && str1 != "PNG" && str1 != "Png" && str1 != "tga" && str1 != "TGA" && str1 != "Tga" && str1 != "tif" && str1 != "TIF" && str1 != "Tif" && str1 != "tiff" && str1 != "TIFF" && str1 != "Tiff") {
   		alert("Invalid File -- Please select a .bmp, .gif, .jpg, .jpeg. .png, .tga, .tif, or .tiff file (jpg preferred).");
		document.getElementById('file1Div').innerHTML = document.getElementById('file1Div').innerHTML;
   		return false;
  	}
  	else
  	return true;
}

function checkFile2() {
	var strFile2 = document.BHG_Contractor_Application.Attachment2.value;
  	str2 = strFile2.substring(strFile2.lastIndexOf(".") + 1,strFile2.length);
  	if(str2 != "bmp" && str2 != "BMP" && str2 != "Bmp" && str2 != "gif" && str2 != "GIF" && str2 != "Gif" && str2 != "jpeg" && str2 != "JPEG" && str2 != "Jpeg" && str2 != "jpg" && str2 != "JPG" && str2 != "Jpg" && str2 != "png" && str2 != "PNG" && str2 != "Png" && str2 != "tga" && str2 != "TGA" && str2 != "Tga" && str2 != "tif" && str2 != "TIF" && str2 != "Tif" && str2 != "tiff" && str2 != "TIFF" && str2 != "Tiff") {
   		alert("Invalid File -- Please select a .bmp, .gif, .jpg, .jpeg. .png, .tga, .tif, or .tiff file (jpg preferred).");
		document.getElementById('file2Div').innerHTML = document.getElementById('file2Div').innerHTML;
   		return false;
  	}
  	else
  	return true;
}

function checkFile3() {
	var strFile3 = document.BHG_Contractor_Application.Attachment3.value;
  	str3 = strFile3.substring(strFile3.lastIndexOf(".") + 1,strFile3.length);
  	if(str3 != "bmp" && str3 != "BMP" && str3 != "Bmp" && str3 != "gif" && str3 != "GIF" && str3 != "Gif" && str3 != "jpeg" && str3 != "JPEG" && str3 != "Jpeg" && str3 != "jpg" && str3 != "JPG" && str3 != "Jpg" && str3 != "png" && str3 != "PNG" && str3 != "Png" && str3 != "tga" && str3 != "TGA" && str3 != "Tga" && str3 != "tif" && str3 != "TIF" && str3 != "Tif" && str3 != "tiff" && str3 != "TIFF" && str3 != "Tiff") {
   		alert("Invalid File -- Please select a .bmp, .gif, .jpg, .jpeg. .png, .tga, .tif, or .tiff file (jpg preferred).");
		document.getElementById('file3Div').innerHTML = document.getElementById('file3Div').innerHTML;
   		return false;
  	}
  	else
  	return true;
}