function checkFileType(fileName){
		var ext = fileName.substring(fileName.lastIndexOf('.') + 1);
		ext = ext.toLowerCase();
		if( ext == "jpg" || ext == "gif" || ext == "png" /*|| ext == "bmp"*/) {
			return true;
		} else {
			return false;
		} // if(ext...)
	} // checkFileType(fileName)

	function validateUpload(frm) {
		var type;
		var fileLabel = document.getElementById("lbl4file"); 
		
		if(!frm.inputFile.value) { // No file is selected for upload
			//alert("Please select a file to upload!");
			fileLabel.innerHTML = "Please select a file to upload!";	
			frm.inputFile.focus();
			return false;
		} else if(frm.inputFile.value != "") {
			type = checkFileType(frm.inputFile.value);
			if(type == true) { // if a valid image file is uploaded
				frm.submit()	
			} else {
				//alert("Please select a valid image file to upload!");	
				fileLabel.innerHTML = "Please select a valid image file to upload!";
				return false;	
			}// if(type==...)
		} // if (frm.inputFile.value != "")	
	} // validateUpload(frm)