function validateFileExtension(fld)
{
		if(!/(\.bmp|\.gif|\.jpg|\.jpeg)$/i.test(fld.value)) 
		{
		alert("Invalid image file type: please upload only .jpg, .jpeg, .gif or .bmp file");
		fld.form.reset();
		fld.focus();
		return false;
		}
		return true;
}